Dictionary of Engineering Episode 2 Part 5 ppt

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M clamped in the chuck of a power-driven machine. m See meter. macadam [ CIV ENG ] Uniformly graded stones {məshe ¯ n fı ¯ l} consolidated by rolling to form a road surface; machine-gun microphone See line microphone. may be bound with water or cement, or coated {məshe ¯ n gən mı ¯ иkrəfo ¯ n} with tar or bitumen. { məkadиəm} machine-hour [ IND ENG ] A unit representing maceration [ CHEM ENG ] The process of ex- the operation of one machine for 1 hour; used tracting fragrant oils from flower petals by im- in the determination of costs and economics. mersing them in hot molten fat. { masиəra ¯ и {məshe ¯ n ¦au ˙ r} shən} machine idle time [ IND ENG ] Time during a work machete [ DES ENG ] A knife with a broad blade cycle when a machine is idle, awaiting comple- 2 to 3 feet (60 to 90 centimeters) long. tion of manual work. { məshe ¯ n ı ¯ dиəl tı ¯ m} {məshedиe ¯ or məchedиe ¯ } machine interference [ IND ENG ] A situation in Mach indicator See Machmeter. { ma ¨ k inиdə which two or more units of equipment simulta- ka ¯ dиər} neously require service. { məshe ¯ n inиtərfirи machine [ MECH ENG ] A combination of rigid or əns } resistant bodies having definite motions and machine key [ DES ENG ] A piece inserted be- capable of performing useful work. { məshe ¯ n} tween a shaft and a hub to prevent relative rota- machine attention time [ IND ENG ] Time during tion. Also known as key. { məshe ¯ n ke ¯ } which a machine operator must observe the machine loading [ IND ENG ] 1. Feeding work machine’s functioning and be available for im- into a machine. 2. Planning the amount of use mediate servicing, while not actually operating of a unit of equipment during a given time pe- or servicing the machine. Alsoknown as service riod. { məshe ¯ n lo ¯ dиiŋ } time. { məshe ¯ n ətenиchən tı ¯ m} machine-paced operation [ IND ENG ] The pro- machine bolt [ DES ENG ] A heavy-weight bolt portion of an operation cycle during which the with a square, hexagonal, or flat head used in machine controls the speed of work progress. the automotive, aircraft, and machinery fields. {məshe ¯ n ¦pa ¯ st a ¨ pиəra ¯ иshən} {məshe ¯ n bo ¯ lt } machine capability [ IND ENG ] A qualitative or machine rating [ MECH ENG ] The power that a quantitative statement of the performance po- machine can draw or deliver without overheat- tential of a specific item of power equipment. ing. { məshe ¯ n ra ¯ dиiŋ } {mə¦she ¯ n ka ¯ иpəbilиədиe ¯ } machine run See run. { məshe ¯ n ¦rən} machine controlled time [ IND ENG ] The time machinery [ MECH ENG ] A group of parts or ma- necessary for a machine to complete the auto- chines arranged to perform a useful function. matic portion of a work cycle. Also known as {məshe ¯ nиre ¯ } independent machine time; machine element; machine screw [ DES ENG ] A blunt-ended screw machine time. { məshe ¯ nkən¦tro ¯ ld tı ¯ m} with a standardized thread and a head that may machine design [ DES ENG ] Application of sci- be flat, round, fillister, or oval, and may be slot- ence and invention to the development, specifi- ted, or constructed for wrenching; used to fasten cation, and construction of machines. { mə machine parts together. { məshe ¯ n skru ¨ } she ¯ ndizı ¯ n} machine setting See mechanical setting. { mə machine drill [ MECH ENG ] Any mechanically she ¯ n sedиiŋ } driven diamond, rotary, or percussive drill. machine shop [ ENG ] A workshop in which work, {məshe ¯ n dril } metal or other material, is machined to specified machine element [ DES ENG ] Any of the elemen- size and assembled. { məshe ¯ n sha ¨ p} tary mechanical parts, such as gears, bearings, machine shot capacity [ ENG ] In injection fasteners, screws, pipes, springs, and bolts used molding, the maximum weight of a given thermo- as essentially standardized componentsfor most plastic resin which can be displaced by a single devices, apparatus, and machinery. See machine stroke of the injection ram. { məshe ¯ n sha ¨ t controlled time. { məshe ¯ n elиəиmənt } machine file [ DES ENG ] A file that can be kəpasиədиe ¯ } Copyright 2003 by The McGraw-Hill Companies, Inc. Click Here for Terms of Use. machine taper machine taper [ MECH ENG ] A taper that pro- MADT See microalloy diffused transistor. MAG See maximum available gain.vides a connection between a tool, arbor, or cen- ter and its mating part to ensure and maintain magazine [ ENG ] 1. A storage area for explo- sives. 2. A building, compartment, or structureaccurate alignment between the parts; permits easy separation of parts. { məshe ¯ n ta ¯ иpər } constructed and located for the storage of explo- sives or ammunition. { ¦magиə¦ze ¯ n} machine-tight [ ENG ] The extent of the tight- ening of a screwed fitting that can be accom- magnesite wheel [ ENG ] A grinding wheel made with magnesium oxychloride as the bondingplished without damaging or stripping the thread. { məshe ¯ n tı ¯ t } agent. { magиnəsı ¯ t we ¯ l} magnetic balance [ ENG ] 1. A device for de- machine time See machine controlled time. {məshe ¯ n tı ¯ m } termining the repulsion or attraction between magnetic poles, in which one magnet is sus- machine tool [ MECH ENG ] A stationary power- driven machine for the shaping, cutting, turning, pended and the forces needed to cancel the ef- fects of bringing a pole of another magnet closeboring, drilling, grinding, or polishing of solid parts, especially metals. { məshe ¯ n tu ¨ l } to one end are measured. 2. Any device for measuring the small forces involved in determin- machine utilization [ ENG ] The percentage of time that a machine is actually in use. ing paramagnetic or diamagnetic susceptibility. { magnedиik balиəns }{məshe ¯ n yu ¨ dиəlиəza ¯ иshən} machining [ MECH ENG ] Performing various cut- magnetic bearing [ MECH ENG ] A device incor- porating magnetic forces to cause a shaft to levi-ting or grinding operations on a piece of work. {məshe ¯ nиiŋ } tate and float in a magnetic field without any contact between the rotating and stationary ele- machining center [ MECH ENG ] Manufacturing equipment that removes metal under computer ments. { magnedиik berиiŋ } magnetic brake [ MECH ENG ] A friction brakenumerical control by making use of several axes and a variety of tools and operations. under the control of an electromagnet. { magnedиik bra ¯ k}{məshe ¯ nиiŋsenиtər} machinist’s file [ DES ENG ] A type of double-cut magnetic chuck [ MECH ENG ] A chuck in which the workpiece is held by magnetic force.file that removes metal fast and is used for rough metal filing. { məshe ¯ иnəsts fil } { magnedиik chək} magnetic clutch See magnetic fluid clutch; mag- Machmeter [ ENG ] An instrument that meas- ures and indicates speed relative to the speed netic friction clutch. { magnedиik kləch } magnetic cutter [ ENG ACOUS ] A cutter in whichof sound, that is, indicates the Mach number. Also known as Mach indicator. { ma ¨ kme ¯ dиər } the mechanical displacements of the recording stylus are produced by the action of magnetic macroanalytical balance [ ENG ] A relatively large type of analytical balance that can weigh fields. { magnedиik kədиər} magnetic drag dynamometer See eddy-currentloads of up to 200 grams to the nearest 0.1 milli- gram. { makиro ¯ anиəlidиəиkəl balиəns } brake. { magnedиik ¦drag dı ¯ иnəma ¨ mиədиər} magnetic drum See drum. { magnedиik drəm} macroelement [ IND ENG ] An element of a work cycle whose time span is long enough to be magnetic drum storage See drum. { magnedиik ¦drəm sto ˙ rиij }observed and measured with a stopwatch. { ¦makиro ¯ elиəиmənt } magnetic earphone [ ENG ACOUS ] An earphone in which variations in electric current produce macromechanics See composite macromechanics. { ¦makиro ¯ иməkanиiks } variations in a magnetic field, causing motion of a diaphragm. { magnedиik irfo ¯ n} macrorheology [ MECH ] A branch of rheology in which materials are treated as homogeneous or magnetic element [ ENG ] That part of an instru- ment producing or influenced by magnetism.quasi-homogeneous, and processes are treated as isothermal. { ¦makиro ¯ иre ¯ a ¨ lиəиje ¯ } { magnedиik elиəиmənt } magnetic field sensor [ ENG ] A proximity sen- macroscopic anisotropy [ ENG ] Phenomenon in electrical downhole logging wherein electric sor that uses a combination of a reed switch and a magnet to detect the presence of a magneticcurrent flows more easily along sedimentary strata beds than perpendicular to them. { ¦makи field. { magnedиik fe ¯ ld senиsər} magnetic filter [ CHEM ENG ] Filtration device inrə¦ska ¨ pиik anиəsa ¨ иtrəpe ¯ } macroscopic property See thermodynamic prop- which the filter screen is magnetized to trap and remove fine iron from liquids or liquid suspen-erty. { ¦makиrə¦ska ¨ pиik pra ¨ pиərdиe ¯ } macrotome [ ENG ] A device for making large an- sions being filtered. { magnedиik filиtər} magnetic fluid clutch [ MECH ENG ] A frictionatomical sections. { makиrəto ¯ m} madistor [ ELECTR ] A cryogenic semiconductor clutch that is engaged by magnetizing a liquid suspension of powdered iron located betweendevice in which injection plasma can be steered or controlled by transverse magnetic fields, to pole pieces mounted on the input and output shafts. Also known as magnetic clutch.give the action of a switch. { madisиtər} Madsen impedance meter [ ENG ] An instru- { magnedиik ¦flu ¨ иəd kləch } magnetic flux quantum [ ELEC ] A fundamentalment for measuring the acoustic impedance of normal and deaf ears, based on the principle of unit of magnetic flux, the total magnetic flux in a fluxoid in a type II superconductor, equal tothe Wheatstone bridge. { madиzənimpe ¯ dиəns me ¯ dиər} h/(2e), where h is Planck’s constant and e is the 340 magnetoelectronics magnitude of the electron charge, or approxi- iron, nickel, or titanium, or nonmagnetic depos- mately 2.07 ϫ 10 Ϫ15 weber. { magnedиik fləks its which either contain magnetic gangue miner- kwa ¨ nиtəm} als or are associated with magnetic structures. magnetic force microscopy [ ENG ] The use of { magnedиik pra ¨ spekиtiŋ } an atomic force microscope to measure the gra- magnetic pulley [ ENG ] Magnetized pulley de- dient of a magnetic field acting on a tip made vice for a conveyor belt; removes tramp iron from of a magnetic material, by monitoring the shift dry products being moved by the belt. of the natural frequency of the cantilever due to { magnedиik pu ˙ lиe ¯ } the magnetic force as the tip is scanned over the magnetic read/write head See magnetic head. sample. { mag¦nedиik ¦fo ˙ rs mı ¯ kra ¨ иskəиpe ¯ } { magnedиik ¦re ¯ d ¦rı ¯ t hed } magnetic friction clutch [ MECH ENG ] A friction magnetic resonance imaging [ ENG ] A tech- clutch in which the pressure between the friction nique in which an object placed in a spatially surfaces is produced by magnetic attraction. varying magnetic field is subjected to a pulse Also known as magnetic clutch. { magnedиik of radio-frequency radiation, and the resulting frikиshən kləch } nuclear magnetic resonance spectra are com- magnetic hardness comparator [ ENG ] A device bined to give cross-sectional images. Abbrevi- for checking the hardness of steel parts by plac- ated MRI. { magnedиik rezиənиəns imиijиiŋ } ing a unit of known proper hardness within an magnetic separator [ ENG ] A machine for sepa- induction coil; the unit to be tested is then rating magnetic from less magnetic or nonmag- placed within a similar induction coil, and the netic materials by using strong magnetic fields; behavior of the induction coils compared; if the used for example, in tramp iron removal, or con- standard and test units have the same magnetic centration and purification. { magnedиik sepи properties, the hardness of the two units is con- əra ¯ dиər} sidered to be the same. { magnedиik ha ¨ rdиnəs magnetic sound track [ ENG ACOUS ] A magnetic kəmparиədиər} tape, attached to a motion picture film, on which magnetic head [ ELECTR ] The electromagnet a sound recording is made. { magnedиik used for reading, recording, or erasing signals sau ˙ n trak } on a magnetic disk, drum, or tape. Also known magnetic source imaging [ ENG ] A method of as magnetic read/write head. { magnedиik mapping electric currents within an object, hed } particularly currents associated with biological magnetic induction gyroscope [ ENG ] A gyro- activity, by using an array of SQUID magneto- scope without moving parts, in which alternat- meters to detect the resulting magnetic fields ing- and direct-current magnetic fields act on surrounding the object. Abbreviated MSI. water doped with salts which exhibit nuclear { magnedиik so ˙ rs imиijиiŋ } paramagnetism. { magnedиik in¦dəkиshən jı ¯ и magnetic speaker See magnetic loudspeaker. rəsko ¯ p} { magnedиik spe ¯ kиər} magnetic loudspeaker [ ENG ACOUS ] Loud- magnetic tunnel junction [ ELECTR ] A magnetic speaker in which acoustic waves are produced storage and switching device in which two mag- by mechanical forces resulting from magnetic netic layers are separated by an insulating bar- reactions. Also known as magnetic speaker. rier, typically aluminum oxide, that is only 1–2 { magnedиik lau ˙ dspe ¯ kиər} nanometers thick, allowing an electronic current magnetic microphone [ ENG ACOUS ] A micro- whose magnitude depends on the orientation phone consisting of a diaphragm acted upon of both magnetic layers to tunnel through the by sound waves and connected to an armature barrier when it is subject to a small electric bias. which varies the reluctance in a magnetic field { mag¦nedиik tənиəl jəŋkиshən} surrounded by a coil. Also known as reluctance magneto [ ELEC ] An alternating-current genera- microphone; variable-reluctance microphone. tor that uses one or more permanent magnets { magnedиik mı ¯ иkrəfo ¯ n} to produce its magnetic field; frequently used as magnetic pickup See variable-reluctance pickup. a source of ignition energy on tractor, marine, { magnedиik pikəp} industrial, and aviation engines. Also known magnetic potentiometer [ ENG ] Instrument that as magnetoelectric generator. { magne ¯ dиo ¯ } measures magnetic potential differences. magneto anemometer [ ENG ] A cup anemome- { magnedиik pətenиche ¯ a ¨ mиədиər} ter with its shaft mechanically coupled to a mag- magnetic pressure transducer [ ENG ] A type of net; both the frequency and amplitude of the pressure transducer in which a change of pres- voltage generated are proportional to the wind sure is converted into a change of magnetic re- speed, and may be indicated or recorded by suit- luctance or inductance when one part of a mag- able electrical instruments. { magne ¯ dиo ¯ anи netic circuit is moved by a pressure-sensitive əma ¨ mиədиər} element, such as a bourdon tube, bellows, or magnetocaloric effect [ THERMO ] The revers- diaphragm. { magnedиik preshиər tranzdu ¨ и ible change of temperature accompanying the sər} change of magnetization of a ferromagnetic ma- magnetic prospecting [ ENG ] Carrying out air- terial. { mag¦ne ¯ dиo ¯ иkəlo ˙ rиik ifekt } borne or ground surveys of variations in the magnetoelectronics [ ELECTR ] The use of elec- earth’s magnetic field, using a magnetometer or other equipment, to locate magnetic deposits of tron spin (as opposed to charge) in electronic 341 magnetometer devices. Also known as spin electronics; spin- aluminum wire used in the coils of all types of electromagnetic machines and devices. { magиtronics. { magnedиo ¯ иiиlektra ¨ nиiks } magnetometer [ ENG ] An instrument for mea- nət wı ¯ r} magnistor [ ELECTR ] A device that utilizes thesuring the magnitude and sometimes also the direction of a magnetic field, such as the earth’s effects of magnetic fields on injection plasmas in semiconductors such as indium antimonide.magnetic field. { magиnəta ¨ mиədиər} magnetooptic recording [ ENG ] An erasable { magnisиtər} main [ ELEC ] 1. One of the conductors ex-data storage technology in which data are stored on a rotating disk in a thin magnetic layer that tending from the service switch, generator bus, or converter bus to the main distribution centermay be switched between two magnetization states by the combination of a magnetic field and in interior wiring. 2. See power transmission line. [ ENG ] A duct or pipe that supplies ora pulse of light from a diode laser. { magnedи o ¯ a ¨ pиtik riko ˙ rdиiŋ } drains ancillary branches. { ma ¯ n} main bearing [ MECH ENG ] One of the bearings magnetoresistance [ ELECTR ] The change in the electrical resistance of a material when it that support the crankshaft in an internal com- bustion engine. { ¦ma ¯ n berиiŋ }is subjected to an applied magnetic field, this property has widespread application in sensors main firing [ ENG ] The firing of a round of shots by means of current supplied by a transformerand magnetic read heads. { mag¦ne ¯ dиo ¯ иrizisи təns } fed from a main power supply. { ma ¯ n fı ¯ rиiŋ } main shaft [ MECH ENG ] The line of shafting re- magnetoresistive memory [ ELECTR ] A random- access memory that uses the magnetic state of ceiving its power from the engine or motor and transmitting power to other parts. { ma ¯ nsmall ferromagnetic regions to store data, plus magnetoresistive devices to read the data, all shaft } maintainability [ ENG ] 1. The ability of equip-integrated with silicon integrated-circuit elec- tronics. { magnedиo ¯ иrizisиtiv memиre ¯ } ment to meet operational objectives with a mini- mum expenditure of maintenance effort under magnetoresistor [ ELECTR ] Magnetic field-con- trolled variable resistor. { mag¦ne ¯ dиo ¯ иrizisиtər } operational environmental conditions in which scheduled and unscheduled maintenance is per- magnetostrictive filter [ ELECTR ] Filter network which uses the magnetostrictive phenomena to formed. 2. Quantitatively, the probability that an item will be restored to specified conditionsform high-pass, low-pass, band-pass, or band- elimination filters; the impedance characteristic within a given period of time when maintenance action is performed in accordance with pre-is the inverse of that of a crystal. { mag¦ne ¯ dи o ¯ ¦strikиtiv filиtər } scribed procedures and resources. { ma ¯ nta ¯ и nəbilиədиe ¯ } magnetostrictive loudspeaker [ ENG ACOUS ] Loudspeaker in which the mechanical forces re- maintenance [ IND ENG ] The upkeep of indus- trial facilities and equipment. { ma ¯ ntиənиəns }sult from the deformation of a material having magnetostrictive properties. { mag¦ne ¯ dиo ¯ ¦strikи maintenance engineering [ IND ENG ] The func- tion of providing policy guidance for mainte-tiv lau ˙ dspe ¯ kиər} magnetostrictive microphone [ ENG ACOUS ] nance activities, and of exercising technical and management review of maintenance programs.Microphone which depends for its operation on the generation of an electromotive force by the { ma ¯ ntиənиəns enиjənirиiŋ } maintenance kit [ ENG ] A collection of items notdeformation of a material having magneto- strictive properties. { mag¦ne ¯ dиo ¯ ¦strikиtiv mı ¯ и all having the same basic name, which are of a supplementary nature to a major component orkrəfo ¯ n} magnetostrictive oscillator [ ELECTR ] An oscil- equipment; the items within the collection may provide replacement parts and facilitate suchlator whose frequency is controlled by a magne- tostrictive element. { mag¦ne ¯ dиo ¯ ¦strikиtiv a ¨ sи functions as inspection, test repair, or preventive types of maintenance, for the specific purposeəla ¯ dиər} magnetovision [ ENG ] A method of measuring of restoring and improving the operational sta- tus of a component or equipment comparableand displaying magnetic field distributions in which scanning results from a thin-film Permal- to its original capacity and efficiency. { ma ¯ ntи ənиəns kit }loy magnetoresistive sensor are processed nu- merically and presented in the form of a color maintenance vehicle [ ENG ] Vehicle used for carrying parts, equipment, and personnel formap on a video display unit. { magnedи əvizhиən } maintenance or evacuation of vehicles. { ma ¯ ntиənиəns ve ¯ иəиkəl} magnetron [ ELECTR ] One of a family of crossed-field microwave tubes, wherein elec- major assembly [ ENG ] A self-contained unit of individual identity; a completed assembly oftrons, generated from a heated cathode, move under the combined force of a radial electric field component parts ready for operation, but uti- lized as a portion of, and intended for furtherand an axial magnetic field in such a way as to produce microwave radiation in the frequency installation in, an end item or major item. { ma ¯ иjər əsemиble ¯ }range 1–40 gigahertz; a pulsed microwave radia- tion source for radar, and continuous source for major defect [ IND ENG ] Defect which causes se- rious malfunctioning of a product. { ma ¯ иjərmicrowave cooking. { magиnətra ¨ n} magnet wire [ ELEC ] The insulated copper or de ¯ fekt } 342 M-A-N scavenging system major diameter [ DES ENG ] The largest diameter with special reference to the atomic bomb. { manhatиən pra ¨ jekt }of a screw thread, measured at the crest for an external (male) thread and at the root for an manhead See manhole. { manhed } manhole [ ENG ] An opening to provide accessinternal (female) thread. { ma ¯ иjərdı ¯ amиədи ər } to a tank or boiler, to underground passages, or in a deck or bulkhead of a ship; usually covered majority carrier [ ELECTR ] The type of carrier, that is, electron or hole, that constitutes more with a cast iron or steel plate. Also known as access hole; manhead. { manho ¯ l}than half the carriers in a semiconductor. {məja ¨ rиədиe ¯ karиe ¯ иər} man-hour [ IND ENG ] A unit of measure repre- senting one person working for one hour. majority emitter [ ELECTR ] Of a transistor, an electrode from which a flow of minority carriers { manau ˙ r} manifold [ ENG ] The branch pipe arrangemententers the interelectrode region. { məja ¨ rиədиe ¯ imidиər } which connects the valve parts of a multicylinder engine to a single carburetor or to a muffler. major repair [ ENG ] Repair work on items of ma- terial or equipment that need complete overhaul { manиəfo ¯ ld } manifolding [ ENG ] The gathering of multiple-or substantial replacement of parts, or that re- quire special tools. { ma ¯ иjərriper } line fluid inputs into a single intake chamber (intake manifold), or the division of a single fluid makeup air [ ENG ] The volume of air required to replace air exhausted from a given space. supply into several outlet streams (distribution manifold). { manиəfo ¯ ldиiŋ }{ ma ¯ kəp er } makeup water [ CHEM ENG ] Water feed needed manifold pressure [ MECH ENG ] The pressure in the intake manifold of an internal combustionto replace that which is lost by evaporation or leakage in a closed-circuit, recycle operation. engine. { manиəfo ¯ ld preshиər} manikin [ ENG ] A correctly proportioned doll-{ ma ¯ kəp wo ˙ dиər} male connector [ ELEC ] An electrical connector like figure that is jointed and will assume any human position and hold it; useful in art to drawwith protruding contacts for joining with a fe- male connector. { ma ¯ lkənekиtər } a human figure in action, or in medicine to show the relations of organs by means of movable mallet [ DES ENG ] An implement with a barrel- shaped head made of wood, rubber, or other soft parts. { manиəиkən} manipulative grasp See tripodal grasp. { mə¦nipиmaterial; used for driving another tool, such as a chisel, or for striking a surface without causing yəиlədиiv grasp } manipulative skill [ IND ENG ] The ability of adamage. { malиət} Mallory bonding [ DES ENG ] Hermetically seal- worker to handle an object with the appropriate control and speed of movement required by aing polished silicon chips to polished glass plates by placing the two pieces together, heat- task. { mə¦nipиyəиlədиiv skil } manipulators [ CONT SYS ] An armlike mecha-ing them to about 350ЊC (662ЊF), and applying approximately 8000 volts across the assembly. nism on a robotic system that consists of a series of segments, usually sliding or jointed which{ malиəиre ¯ ba ¨ ndиiŋ } management control system [ IND ENG ] Any grasp and move objects with a number of de- grees of freedom, under automatic control. Seeone of the various systems used by a contractor to plan, control the cost, and schedule the work remote manipulator. { mənipиyəla ¯ dиərz } man-machine chart See human-machine chart.required to undertake and complete a project. { manиijиmənt ¦kəntro ¯ l sisиtəm} {man mə¦she ¯ n cha ¨ rt } man-machine system See human-machine system. management engineering See industrial engi- neering. { manиijиmənt enиjənirиiŋ }{man mə¦she ¯ n sisиtəm} manocryometer [ THERMO ] An instrument for management game [ IND ENG ] A training exer- cise in which prospective decision makers act out measuring the change of a substance’s melting point with change in pressure; the height of amanagerial decision-making roles in a simulated environment. Also known as business game; mercury column in a U-shaped capillary sup- ported by an equilibrium between liquid andoperational game. { manиijиmənt ga ¯ m} mandrel [ ENG ] The core around which continu- solid in an adjoining bulb is measured, and the whole apparatus is in a thermostat. { manиo ¯ ous strands of impregnated reinforcement mate- rials are wound to fabricate hollow objects made krı ¯ a ¨ mиədиər} manometer [ ENG ] A double-leg liquid-columnof composite materials. [ MECH ENG ] A shaft inserted through a hole in a component to sup- gage used to measure the difference between two fluid pressures. { məna ¨ mиədиər}port the work during machining. { manиdrəl} mandrel press [ MECH ENG ] A press for driving manometry [ ENG ] The use of manometers to measure gas and vapor pressures. { məna ¨ mиmandrels into holes. { manиdrəl pres } mangle gearing [ MECH ENG ] Gearing for pro- əиtre ¯ } manostat [ ENG ] Fluid-filled, upside-down ma-ducing reciprocating motion; a pinion rotating in a single direction drives a rack with teeth at nometer-type device used to control pressures within an enclosure, as for laboratory analyticalthe ends and on both sides. { maŋиgəl girиiŋ } Manhattan Project [ ENG ] A United States proj- distillation systems. { manиəstat } M-A-N scavenging system [ MECH ENG ] A sys-ect lasting from August 1942 to August 1946, which developed the atomic energy program, tem for removing used oil and waste gases from 343 mantle a cylinder of an internal combustion engine in marine engineering [ ENG ] The design, con- which the exhaust ports are located above the struction, installation, operation, and mainte- intake ports on the same side of the cylinder, so nance of main power plants, as well as the asso- that gases circulate in a loop, leaving a dead ciated auxiliary machinery and equipment, for spot in the center of the loop. { ¦em¦a ¯ ¦en skavи the propulsion of ships. { məre ¯ n enиjənirиiŋ } ənjиiŋsisиtəm} marine railway [ CIV ENG ] A type of dry dock mantle [ ENG ] A lacelike hood or envelope consisting of acradle of wood or steel with rollers (sack) of refractory material which, when posi- on which the ship may be hauled out of the water tioned over a flame and heated to incandes- along a fixed inclined track leading up the bank cence, gives light. { mantиəl} of a waterway. { məre ¯ n ra ¯ lwa ¯ } manual control unit [ CONT SYS ] A portable, marine terminal [ CIV ENG ] That part of a port hand-held device that allows an operator to pro- or harbor with facilities for docking, cargo-han- gram and store instructions related to robot mo- dling, and storage. { məre ¯ n termиənиəl} tions and positions. Also known as program- market analysis [ IND ENG ] The collection and ming unit. { manиyəиwəlkəntro ¯ l yu ¨ иnət} evaluation of data concerned with the past, pres- manual element [ IND ENG ] A specific measur- ent, or future attributes of potential consumers able subdivision of a work cycle or operation for a product or service. { marиkət ənalиəиsəs} that is completed entirely by hand or with the marmon clampband [ DES ENG ] A metal band use of tools. { manиyəиwəl elиəиmənt } that wraps around the circumference of a special manually controlled work See effort-controlled cylindrical joint between two structures, hold- cycle. { manиyəиle ¯ kən¦tro ¯ ld wərk } ing the structures together. { ma ¨ rиmən klamp manual time See hand time. { manиyəиwəl tı ¯ m} ban } manual tracking [ ENG ] System of tracking a tar- Marvin sunshine recorder [ ENG ] A sunshine re- get in which all the power required is supplied corder in which the time scale is supplied by a manually through the tracking handwheels. chronograph, and consisting of two bulbs (one of { manиyəиwəl trakиiŋ } which is blackened) that communicate through a manufacturer’s part number [ IND ENG ] Identifi- glass tube of small diameter, which is partially cation number of symbol assigned by the manu- filled with mercury and contains two electrical facturer to a part, subassembly, or assembly. contacts; when the instrumentis exposed to sun- { manиəfakиchərиərz pa ¨ rt nəmиbər} many-body problem [ MECH ] The problem of shine, the air in the blackened bulb is warmed predicting the motions of three or more objects more than that in the clear bulb; the warmed obeying Newton’s laws of motion and attracting air expands and forces the mercury through the each other according to Newton’s law of gravita- connecting tube to a point where the electrical tion. Also known as n-body problem. { menи contacts are shorted by the mercury; this com- e ¯ ba ¨ dиe ¯ pra ¨ bиləm} pletes the electrical circuit to the pen on the Marangoni effect [ CHEM ENG ] The effect that a chronograph. { ma ¨ rиvən sənshı ¯ nriko ˙ rdиər} disturbance of the liquid-liquid interface (due to mask [ DES ENG ] A frame used in front of a tele- interfacial tension) has on mass transfer in a vision picture tube to conceal the rounded edges liquid-liquid extraction system. { ma ¨ rиa ¨ ŋgo ¯ и of the screen. [ ELECTR ] A thin sheet of metal ne ¯ ifekt } or other material containing an open pattern, marbling [ ENG ] The use of antiquing tech- used to shield selected portions of a semicon- niques to achieve the appearance of marble in ductor or other surface during a deposition proc- a paint film. { ma ¨ rиbliŋ } ess. [ ENG ] A protective covering for the face marginal cost [ IND ENG ] The extra cost incurred or head in the form of a wire screen, a metal for an extra unit of output. { ma ¨ rиjənиəl ko ˙ st } shield, or a respirator. { mask } marginal product [ IND ENG ] The extra unit of masking [ ELECTR ] 1. Using a covering or coat- output obtained by one extra unit of some factor, ing on a semiconductor surface to provide a all other factors being held constant. { ma ¨ rи masked area for selective deposition or etching. jənиəl pra ¨ dиəkt } 2. A programmed procedure for eliminating radar marginal revenue [ IND ENG ] The extra revenue coverage in areas where such transmissions may achieved by selling an extra unit of output. be of use to the enemy for navigation purposes, { ma ¨ rиjənиəl revиənu ¨ } by weakening the beam in appropriate directions margin of safety [ DES ENG ] A design criterion, or by use of additional transmitters on the same usually the ratio between the load that would frequency at suitable sites to interfere with hom- cause failure of a member or structure and the ing; also used to suppress the beam in areas load that is imposed upon it in service. { ma ¨ rи where it would interfere with television recep- jən əv sa ¯ fиte ¯ } tion. [ ENG ] Preventing entrance of a tracer Margoulis number See Stanton number. { ma ¨ r gas into a vessel by covering the leaks. gu ¨ иləs nəmиbər} { maskиiŋ } marigraph [ ENG ] A self-registering gage thatre- masonry [ CIV ENG ] A construction of stone or cords the heights of the tides. { marиəgraf } similar materials such as concrete or brick. marina [ CIV ENG ] A harbor facility for small { ma ¯ sиənиre ¯ } boats, yachts, and so on, where supplies, repairs, and various services are available. { məre ¯ иnə } masonry dam [ CIV ENG ] A dam constructed of 344 mat stone or concrete blocks set in mortar. { ma ¯ sи mass units [ MECH ] Units of measurement hav- ing to do with masses of materials, such asənиre ¯ dam } masonry drill [ DES ENG ] A drill tipped with ce- pounds or grams. { mas yu ¨ иnəts } mast [ ENG ] 1. A vertical metal pole serving asmented carbide for drilling in concrete or ma- sonry. { ma ¯ sиənиre ¯ dril } an antenna or antenna support. 2. A slender vertical pole which must be held in position by masonry nail [ DES ENG ] Spiral-fluted nail de- signed to bedriven into mortar joints in masonry. guy lines. 3. A drill, derrick, or tripod mounted on a drill unit, which can be raised to operating{ ma ¯ sиənиre ¯ na ¯ l} Mason’s theorem [ CONT SYS ] A formula for the position by mechanical means. 4. A single pole, used as a drill derrick, supported in itsoverall transmittance of a signal flow graph in terms of transmittances of various paths in the upright or operating position by guys. [ MECH ENG ] A support member on certain industrialgraph. { ma ¯ sиənz thirиəm} mass [ MECH ] A quantitative measure of a bo- trucks, such as a forklift, that provides guideways for the vertical movement of the carriage.dy’s resistance to being accelerated; equal to the inverse of the ratio of the body’s acceleration { mast } master [ ENG ] 1. A device which controls sub-to the acceleration of a standard mass under otherwise identical conditions. { mas } sidiary devices. 2. A precise workpiece through which duplicates are made. [ ENG ACOUS ] See mass burning rate [ CHEM ENG ] The loss in mass per unit time by materials burning under master phonograph record. { masиtər} master arm [ ENG ] A component of a remotespecified conditions. { mas bərnиiŋra ¯ t} mass concrete [ CIV ENG ] Concrete set without manipulator whose motions are automatically duplicated by a slave arm, sometimes withstructural reinforcement. { mas ka ¨ nkre ¯ t} mass-distance [ ENG ] The mass carried by a ve- changes of scale in displacement or force. { masиtər a ¨ rm }hicle multiplied by the distance it travels. { mas ¦disиtəns } master bushing See liner bushing. { masиtər bu ˙ shиiŋ } mass flow [ ENG ] A pattern of powder flow oc- curring in hoppers that is characterized by the master cylinder [ MECH ENG ] The container for the fluid and the piston, forming part of a devicepowder flowing at every point, including points adjacent to the hopper wall. { mas flo ¯ } such as a hydraulic brake or clutch. { masиtər silиənиdər} mass-flow bin [ ENG ] A bin whose hopper walls are sufficiently steep and smooth to cause flow of master frequency meter See integrating frequency meter. { masиtər fre ¯ иkwənиse ¯ me ¯ dиər}all the solid, without stagnant regions, whenever any solid is withdrawn. { mas ¦flo ¯ bin } master gage [ DES ENG ] A locating device with fixed hole locations or part positions; locates mass flowmeter [ ENG ] An instrument that measures the mass of fluid that flows through a in three dimensions and generally occupies the same space as the part it represents. { masиpipe, duct, or open channel in a unit time. { mas ¦flo ¯ me ¯ dиər} tər ga ¯ j} master layout [ DES ENG ] A permanent tem- mass-haul curve [ CIV ENG ] A curve showing the quantity of excavation in a cutting which is avail- plate record laid out in reference planes and used as a standard of reference in the develop-able for fill. { mas ¦ho ˙ l kərv } Massieu function [ THERMO ] The negative of ment and coordination of other templates. { masиtər la ¯ au ˙ t}the Helmholtz free energy divided by the temper- ature. { masyu ¨ fəŋkиshən} master mechanic [ ENG ] The supervisor, as at the mine, in charge of the maintenance and in- mass law of sound insulation [ CIV ENG ] The rule stating that sound insulation for a single stallation of equipment. { masиtərməkanиik } master phonograph record [ ENG ACOUS ] Thewall is determined almost wholly by its weight per unit area; doubling the weight of the parti- negative metal counterpart of a disk recording, produced by electroforming as one step in thetion increases the insulation by 5 decibels. { mas lo ˙ əv sau ˙ nd inиsəla ¯ иshən } production of phonograph records. Also known as master. { masиtər fo ¯ иnəgraf rekиərd } mass spectrograph [ ENG ] A mass spectro- scope in which the ions fall on a photographic master/slave manipulator [ ENG ] A mechanical, electromechanical, or hydromechanical deviceplate which after development shows the distri- bution of particle masses. { mas spekиtrə which reproduces the hand or arm motions of an operator, enabling the operator to performgraf } mass spectrometer [ ENG ] A mass spectro- manual motions while separated from the site of the work. { masиtər sla ¯ vmənipиyəla ¯ dиər}scope in which a slit moves across the paths of particles with various masses, and an electrical masticate [ CHEM ENG ] To process rubber on a machine to make it softer and more pliable be-detector behind it records the intensity distribu- tion of masses. { mas spektra ¨ mиədиər } fore mixing with other substances. { masи təka ¯ t} mass spectroscope [ ENG ] An instrument used for determining the masses of atoms or mole- mat [ CIV ENG ] 1. A steel or concrete footing un- der a post. 2. Mesh reinforcement in a concretecules, in which a beam of ions is sent through a combination of electric and magnetic fields so slab. 3. A heavy steel-mesh blanket used to suppress rock fragments during blasting.arranged that the ions are deflected according to their masses. { mas spekиtrəsko ¯ p } { mat } 345 match match [ ENG ] 1. A charge of gunpowder put in coding process for recording or for stereo fre- quency-modulation broadcasting and decoded a paper several inches long and used for igniting back into four channels for playback of re- explosives. 2. A short flammable piece of cordings or for quadraphonic stereo reception. wood, paper, orother material tipped with a com- { ma ¯ иtriks sau ˙ nd sisиtəm} bustible mixture that bursts into flame through matte feeder [ IND ENG ] A heavy-duty apron friction. { mach } feeder composed of thick steel flights attached matched edges [ ENG ] Die face edges machined to a solid chain-link mat supported by closely at right angles to each other to provide for align- spaced rollers. { mat fe ¯ dиər} ment of the dies in machining equipment. Matthiessen sinker method [ THERMO ] A { macht ejиəz} method of determining the thermal expansion matched-metal molding [ ENG ] Forming of rein- coefficient of a liquid, in which the apparent forced-plastic articles between two close-fitting weight of a sinker when immersed in the liquid metal molds mounted in a hydraulic press. is measured for two different temperatures of { macht ¦medиəl mo ¯ ldиiŋ } the liquid. { ¦mathиəиsən siŋиkər methиəd} material balance [ CHEM ENG ] A calculation to mattock [ DES ENG ] A tool with the combined inventory material inputs versus outputs in a features of an adz, an ax, and a pick. { madиək} process system. { mətirиe ¯ иəl balиəns } mattress [ CIV ENG ] A woven mat, often of wire material particle [ MECH ] An object which has and cement blocks, used to prevent erosion of rest-mass and an observable position in space, dikes, jetties, or river banks. { maиtrəs} but has no geometrical extension, being con- maul See rammer. { mo ˙ l} fined to a single point. Also known as particle. Maupertius’ principle [ MECH ] The principle of {mətirиe ¯ иəl pa ¨ rdиəиkəl} least action is sufficient to determine the motion material requirements planning [ IND ENG ] A of a mechanical system. { mo ¯ pərиshəs prinи formal computerized approachto inventory plan- səиpəl} ning, manufacturing scheduling, supplier sched- max-flow min-cut theorem [ IND ENG ] In the uling, and overall corporate planning. Abbrevi- analysis of networks, the concept that for any ated MRP. { mətirиe ¯ иəlrikwı ¯ rиməns planиiŋ } network with a single source and sink, the maxi- materials control [ IND ENG ] Inventory control mum feasible flow from source to sink is equal of materials involved in manufacturing or assem- to the minimum cut value for any of the cuts of bly. { mətirиe ¯ иəlz kəntro ¯ l} the network. { maks¦flo ¯ minkət thirиəm} materials handling [ ENG ] The loading, moving, maximal flow [ IND ENG ] Maximum total flow and unloading of materials. { mətirиe ¯ иəlz from the source to the sink in a connected net- handиliŋ } work. { makиsəиməl flo ¯ } materials science [ ENG ] The study of the na- maximum allowable working pressure [ MECH ture, behavior, and use of materials applied to ENG ] The maximum gage pressure in a pressure science and technology. { mətirиe ¯ иəlz sı ¯ иəns } vessel at a designated temperature, used for the material well [ CHEM ENG ] In a plastics process, determination of the set pressure for relief the space provided in a compression or transfer valves. { makиsəиməm ə¦lau ˙ иəиbəl wərkиiŋ mold to allow for the bulk factor. { mətirиe ¯ и preshиər} əl wel } maximum-and-minimum thermometer [ ENG ] A mat foundation [ CIV ENG ] A large, thick, usually thermometer that automatically registers both reinforced concrete mat which transfers loads the maximum and the minimum temperatures from a number of columns, or columns and walls, attained during an interval of time. { makиsəи to the underlying rock or soil. Also known as məm ən minиəиməmthərma ¨ mиədиər} raft foundation. { mat fau ˙ nda ¯ иshən} maximum angle of inclination [ MECH ENG ] The Matheson joint [ DES ENG ] A wrought-pipe joint maximum angle at which a conveyor may be made by enlarging the end of one pipe length inclined and still deliver an amount of bulk mate- to receive the male end of the next length. rial within a given time. { makиsəиməm aŋиgəl { mathиəиsən jo ˙ int } əv inиkləna ¯ иshən} matrix [ ELECTR ] 1. The section of a color televi- maximum available gain [ ELECTR ] The theoret- sion transmitter that transforms the red, green, ical maximum power gain available in a transis- and blue camera signals into color-difference tor stage; it is seldom achieved in practical cir- signals and combines them with the chromi- cuits because it can be approached only when nance subcarrier. Also known as color coder; feedback is negligible. Abbreviated MAG. color encoder; encoder. 2. The section of a { makиsəиməm ə¦va ¯ lиəиbəl ga ¯ n} color television receiver that transforms the maximum belt slope [ MECH ENG ] A slope be- color-difference signals into the red, green, and yond which the material on the belt of a conveyor blue signals needed to drive the color picture tends to roll downhill. { makиsəиməm belt tube. Also known as color decoder; decoder. slo ¯ p} [ ENG ] A recessed mold in which something is maximum belt tension [ MECH ENG ] The total of formed or cast. { ma ¯ иtriks } the starting and operating tensions in a con- matrix sound system [ ENG ACOUS ] A quadra- veyor. { makиsəиməm belt tenиchən} phonic sound system in which the four input maximum continuous load [ MECH ENG ] The maximum load that a boiler can maintain for achannels are combined into two channels by a 346 mean stress designated length of time. { makиsəиməm states that the difference between the specific kən¦tinиyəиwəs lo ¯ d} heat of a gas at constant pressure and its specific maximum gradability [ MECH ENG ] Steepest heat at constant volume is equal to the gas con- slope a vehicle can negotiate in low gear; usually stant divided by the molecular weight of the gas. expressed in precentage of slope, namely, the { mı ¯ иərz fo ˙ rиmyəиlə } ratio between the vertical rise and the horizontal mb See millibar. distance traveled; sometimes expressed by the McCabe-Thiele diagram [ CHEM ENG ] Graphi- angle between the slope and the horizontal. cal method for calculation of the number of theo- { makиsəиməm gra ¯ dиəbilиədиe ¯ } retical plates or contacting stages required for maximum ordinate [ MECH ] Difference in alti- a given binary distillation operation. { məka ¯ b tude between the origin and highest point of the te ¯ lиədı ¯ иəgram } trajectory of a projectile. { makиsəиməm o ˙ rdи M contour [ CONT SYS ] A line on a Nyquist dia- ənиət} gram connecting points having the same magni- maximum production life [ MECH ENG ] The tude of the primary feedback ratio. { em length of time that a cutting tool performs at ka ¨ nиtu ˙ r} cutting conditions of maximum tool efficiency. M-design bit [ DES ENG ] A long-shank, box- { makиsəиməmprədəkиshən lı ¯ f} threaded core bit made to fit M-design core bar- maximum thermometer [ ENG ] A thermometer rels. { em dizı ¯ n bit } that registers the maximum temperature at- M-design core barrel [ DES ENG ] A double-tube tained during an interval of time. { makиsəи core barrel in which a 2 1 / 2 Њ-taper core lifter is məmthərma ¨ mиədиər} carried inside a short tubular sleeve coupled to maximum working area [ IND ENG ] That portion the bottom end of the inner tube, and the sleeve of the working area that is readily accessible extends downward inside the bit shank to within to the hands of a worker when in his normal a very short distance behind the face of the core operating position. { makиsəиməm wərkиiŋ bit. { em dizı ¯ n ko ˙ r barиəl} erиe ¯ иə } meadow [ ENG ] Range of air-fuel ratio within Maxwell equal-area rule [ THERMO ] At tempera- which smooth combustion may be had. tures for which the theoretical isothermal of a { medиo ¯ } substance, on a graph of pressure against vol- mean-average boiling point [ CHEM ENG ] ume, has a portion with positive slope (as occurs in a substance with liquid and gas phases obey- Pseudo boiling point for a hydrocarbon mix- ing the van der Waals equation), a horizontal ture; calculated from the American Society for line drawn at the equilibrium vapor pressure and Testing and Materials distillation curve’s volu- connecting two parts of the isothermal with neg- metric average boiling point. { ¦me ¯ n ¦avиrij ative slope has the property that the area be- bo ˙ ilиiŋpo ˙ int } tween the horizontal and the part of the isother- mean British thermal unit See British thermal unit. mal above it is equal to the area between the { me ¯ n ¦bridиish thərиməl yu ¨ иnət} horizontal and the part of the isothermal below mean calorie [ THERMO ] One-hundredth of the it. { makswel ¦e ¯ иkwəl erиe ¯ иəru ¨ l} heat needed to raise 1 gram of water from 0 to Maxwell relation [ THERMO ] One of four equa- 100ЊC. { me ¯ n kalиəиre ¯ } tions for a system in thermal equilibrium, each mean effective pressure [ MECH ENG ] A term of which equates two partial derivatives, involv- commonly used in the evaluation for positive ing the pressure, volume, temperature, and en- displacement machinery performance which ex- tropy of the system. { makswel rila ¯ иshən} presses the average net pressure difference in Maxwell’s demon See demon of Maxwell. { mak pounds per square inch on the two sides of the swelz de ¯ иmən} piston in engines, pumps, and compressors. Maxwell’s stress functions [ MECH ] Three func- Abbreviated mep; mp. Also known as mean tions of position, ␾ 1 , ␾ 2 , and ␾ 3 , in terms of pressure. { me ¯ ni¦fekиtiv preshиər} which the elements of the stress tensor ␴ of a mean normal stress [ MECH ] In a system body may be expressed, if the body is in equilib- stressed multiaxially, the algebraic mean of the rium and is not subjected to body forces; the three principal stresses. { me ¯ n ¦no ˙ rmиəl elements of the stress tensor are given by stres } ␴ 11 ϭѨ 2 ␾ 2 /Ѩx 3 2 ϩѨ 2 ␾ 3 /Ѩx 2 2 , ␴ 23 ϭϪѨ 2 ␾ 1 /Ѩx 2 Ѩx 3 , and mean pressure See mean effective pressure. cyclic permutations of these equations. { mak { me ¯ n preshиər} swelz stres fəŋkиshənz } mean specific heat [ THERMO ] The average over Maxwell’s theorem [ MECH ] If a load applied at a specified range of temperature of the specific one point A of an elastic structure results in a heat of a substance. { me ¯ nspəsifиik he ¯ t} given deflection at another point B, then the mean-square-error criterion [ CONT SYS ] Evalu- same load applied at B will result in the same ation of the performance of a control system by deflection at A.{makswelz thirиəm} calculating the square root of the average over mayer [ THERMO ] A unit of heat capacity equal time of the square of the difference between the to the heat capacity of a substance whose tem- actual output and the output that is desired. perature is raised 1Њ Celsius by 1 joule. { mı ¯ и { me ¯ n skwer erиər krı ¯ tirиe ¯ иən} ər} Mayer’s formula [ THERMO ] A formula which mean stress [ MECH ] 1. The algebraic mean of 347 [...]... functions of position, ␺1, 2, and ␺3, in terms of which the elements of the stress tensor ␴ of a body may be expressed, if the body is in equilibrium and is not subjected to body forces; the elements of the stress tensor are given by ␴11 ϭ 2 2 1/ Ѩx2Ѩx3, 23 ϭ 2 2/ Ѩx1Ѩx2 ϩ 2 3/Ѩx1Ѩx3, and cyclic permutations of these equations { mo rerиəz ˙ stres fəŋkиshənz } Morgan equation [THERMO] A modification of. .. sorting operation in which mixtures of particles of mixed sizes, and often of different specific gravities, are separated into fractions by the action of a stream of fluid, usually water { mi kanиəи kəl klasиəиfə kaиshən } ¯ mechanical classifier [MECH ENG] Any of various machines that are commonly used to classify mixtures of particles of different sizes, and sometimes of different specific gravities;... acceleration of gravity; equal to 133. 322 3874 15 pascals; it differs from the torr by less than 1 part in 7,000,000 Abbreviated mmHg Also known as millihg { milиə medи ¯ ər əv mərиkyəиre } ¯ millimeter of water [MECH] A unit of pressure, equal to the pressure exerted by a column of water 1 millimeter high with a density of 1 gram per cubic centimeter under the standard acceleration of gravity; equal to 9.806 65. .. ¯ ¨ ¯ ¨ mechatronics [ENG] A branch of engineering that incorporates the ideas of mechanical and electronic engineering into a whole, and, in particular, covers those areas of engineering concerned with the increasing integration of mechanical, electronic, and software engineering into a production process { mekиə tranиiks } ¨ media migration [CHEM ENG] Carryover of fibers or other filter material by... unit of size used as a basic component for standardizing the design and construction of buildings, building parts, and furniture { majиul } ¨ ¨ modulus of compression See bulk modulus of elasticity { majиəиləs əv kəm preshиən } ¨ modulus of decay [MECH] The time required for the amplitude of oscillation of an underdamped harmonic oscillator to drop to 1/e of its initial value; the reciprocal of the... ¯ modulus of deformation [MECH] The modulus of elasticity of a material that deforms other than according to Hooke’s law { majиəиləs əv de ¨ ¯ for maиshən } ˙ ¯ modulus of elasticity [MECH] The ratio of the increment of some specified form of stress to the increment of some specified form of strain, such as Young’s modulus, the bulk modulus, or the shear modulus Also known as coefficient of elasticity;... size of screen or of particles passed by it in terms of the number of openings occurring per linear inch in each direction Also known as mesh size [ELEC] A set of branches forming a closed path in a network so that if any one branch is omitted from the set, the remaining branches of the set do not form a closed path Also known as loop [MECH ENG] Engagement or working contact of teeth of gears or of a... jə nirиiŋ } methods study [IND ENG] An analysis of the methods in use, of the means and potentials for their improvement, and of reducing costs { methиədz stədиe } ¯ metric centner [MECH] 1 A unit of mass equal to 50 kilograms 2 A unit of mass equal to 100 kilograms Also known as quintal { meиtrik sentиnər } metric grain [MECH] A unit of mass, equal to 50 milligrams; used in commercial transactions... [MECH] A unit of volume equal to 10Ϫ3 liter or 10Ϫ6 cubic meter Abbreviated ml Also known as mil { milиə ledиər } ¯ millimeter [MECH] A unit of length equal to one-thousandth of a meter Abbreviated mm Also known as metric line; strich { milи ə medиər } ¯ millimeter of mercury [MECH] A unit of pressure, equal to the pressure exerted by a column of mercury 1 millimeter high with a density of 13 .59 51 grams... construction 2 A cavity which imparts its form to a fluid or malleable substance [ENG ACOUS] The metal part derived from the master by electroforming in reproducing disk recordings; has grooves similar to those of the recording { mold } ¯ mold base [ENG] The assembly of all parts of an injection mold except the cavity, cores, and pins { mold bas } ¯ ¯ molded-fabric bearing [DES ENG] A bearing composed of laminations . of the rium and is not subjected to body forces; the three principal stresses. { me ¯ n ¦no ˙ rmиəl elements of the stress tensor are given by stres } ␴ 11 ϭѨ 2 ␾ 2 /Ѩx 3 2 ϩѨ 2 ␾ 3 /Ѩx 2 2 ,. time to repair [ ENG ] A measure of relia- ing operation in which mixtures of particles of bility of a piece of repairable equipment, giving mixed sizes, and often of different specific gravi- the. forced through a 0.0 8 25 -inch (2. 0 955 -millimeter) orifice in 10 mechatronics [ ENG ] A branch of engineering that incorporates the ideas of mechanical and minutes by a 21 60-gram force. { melt indeks