.m;_ .__-_
`
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`
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`
`_
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`
`1\\cliraw-llill
`I’IC'I‘NM‘AIH' "I”
`SCIEN’I‘
`’II] “N"
`'I‘IECIINIC '1 TERMS
`ullrtll Edition
`
`
`
`
`
`-_VW EX1017 U.S. 5 - 0. 7,116,081
`
`a
`
`\\ .
`
`VW EX1017
`U.S. Patent No. 7,116,081
`
`

`

`l
`
`.
`
`McGrmv-llill
`
`IIIII’I‘IIINAIIIY 0F
`
`SCIENTIFIC MID
`
`'I‘IECIINICAIIA
`
`’I‘Iilms
`
`
`
`gyluil I'. I'nrlwr
`EDITOR IN CHIEF
`
`mcGRAW-Hlll BOOK COMPANY
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`New York
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`On the cover: Pattern produced from white light by a computer-generated
`diffraction plate containing 529 square apertures arranged In a 23 x 23 array.
`(Fl. B. Hoover, Marshall Space Flight Center]
`
`On the title pages: Aerial photograph of the Sinai Peninsula made by Gemini
`spacecraft. {NASA}
`
`Included in this Dictionary are definitions which have been published previously in 1lmfollowing
`works: P. B. Jordain, Condensed Computer Encyclopedia, Copyright © 1969 by MoGrawHill, Inc.
`All righls reserved. ,I. Markus, Electronics and Nucleonics Dictionary, fllh ed., Copyright© 1960,
`1966, 1978 by MoGraw-Hill, Inc. All rights reserved. ,I. Quick, Artists’ami liltistrators‘ Enqclopedia,
`Copyright © 1969 by McCraw-l'lill, Inc. All rights reserved. Blairiston’s Could Medical flctionary,
`3d 9.01., Copyright © 1956, 19?2 by McGraw-Hill,
`Inc. All rights reserved. T. Baumiister and
`L. S. Marks, eds, Standard Handbook for Mechanical Engineers, 7th ed., Copyright © 1933, 1967
`by McGraw-Hill, Inc. All rights reserved.
`
`in addition, material has been drawn from the following references: R. E. Huschke, Gossary of
`Meteorology, American Meteorological Society, 1959; U.S. Air Force Glossary ofStandardizd Terms,
`AF Manual 11-1, vol. 1, 1972; Commrtnications-Electronics Terminology, AF Manual 11-1, vol. 3,
`1970; W. H. Allen, ecl., Dictionary of Technical Terms for Aerospace Use, 151 ed.. Natiolal Aero-
`nautics and Space Administration, 1965; .l. M. Gilliland, Solar-Terrestrial Physics: A Cbssary of
`Terrrts and Abbreviations, Royal Aircraft Establishment Technical Report 67158, 1967; Cbssary of
`Air Trajstic Control Terms, Federal Aviation Agency; A Glossary of Range Terminology, Wide Sands
`Missile Range, New Mexico, National Bureau of Standards, AD 467424; A DOD Glossary offlapping,
`Charting and Geodetic Terms, lat erL. Department of Defense, 1967; P. W. Thrush, comp. ind ed.,
`A Dictionary of Mining, Mineral, and Related Terms, Brown of Mines, 1968; Nuclear Terms.- A
`Glossary, 2d ed., Atomic Energy Commission: F. Casey, ed., Compilation of Terms in infirmatiort
`Sciences Technology, Federal Council for Science and Technology, 1970; Glossary of'Stinfi Termiv
`noiogy, Office of Aerospace Research, U.S. Air Force, 1963; Naval Dictionary of Electrons, Tee-li—
`nical, and Imperative Term, Bureau of Naval Personnel, 1962; ADP Glossary, Departmett of the
`Navy, NAVSO P3097.
`
`McGRAW—HILL DICTIONARY OF SCIENTIFIC AND TECHNICAL TERMS,
`Fourth Edition
`
`Copyright © 1989, 1984, 1978, 1976, 1974 by McCraw-Hill, Inc. All rights reserved. Pinted in
`the United States of America. Except as permitted under the United States Copyright Act if 1976,
`no part of this publication may be reproduced or distributed in any form or by any means. it stored
`in a data base or retrieval system. without the prior written permission of the publisher.
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`234567890
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`DOWJ‘DOW
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`395432109
`
`ISBN 3-97-095270-‘1
`
`Library of Congress Cataloging-in-Puhlicatiou Data
`
`MeGraw-Hill dictionary of scientific and technical terms.
`
`I. Science—Dictionaries.
`1. Parker, Sybil P.
`Q 123. M34-
`1989
`ISBN 0-07-0452709
`
`2. Technology—Dictionarics.
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`For more information about other McGraw-Hill materials, call 1-800—2-MCGRAW In the
`United States. In other countries, call your nearest McGraw-Hlil office.
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`

`pulse-code modulation television
`
`pulse—height selector
`
`1521
`
`own three—place code: each sample of the signal is then trans-
`mitted as the code for the nearest standard amplitude. Abbre—
`viated PCM.
`{
`'pais1kod ,miij‘a'ia-shan }
`pulse-code modulation television {COMMUNI A television
`system in which digital signals using a pulse code are trans-
`mitted. rather than analog signals.
`{
`'pals [kod ,miij-a'lai-shan
`'tel‘olvizh-an }
`'pals .kod-or }
`{
`pulse coder See coder,
`pulse coding and correlation
`ICUMMUNI A general tech-
`nique concerning a variety of methods used to change the
`transmitted wavefornt and then decode upon its reception; pulse
`compression is a special fornt of pulse coding and correlation.
`{
`'pols :kod-itj on ,kiino'la-shon }
`pulse column
`[(‘lll—IM liNUl Continuous—phase process col—
`umn (such as liquid only or gas only) in which the flow—through
`is pulsating: used to increase mass-transfer rates. as in a liquid—
`liquid extraction operation.
`{
`'pols iItal-am }
`pulse communication
`ICOMMUNJ
`Radio communication
`using pulse modulation.
`{
`'pals ka,toyu-na,ka-shan i
`put“ compression
`|t—.I.t—:t't't<|
`A matched tiller technique
`used to discriminate against signals which do not correspond
`to the transmitted signal.
`{
`'pals kont,presh-on }
`pulse-compression radar
`[mo] A radar system in which
`the transmitted signal is linearly frequency—modulated or other-
`wise spread out in time to reduce the peak power that must be
`handled by the transmitter: signal amplitude is kept constant:
`the receiver uses a linear litter to compress the signal and
`thereby reconstitute a short pulse for the radar display.
`{
`'pals
`kam,presh'on 'r:i,da'r }
`pulse counter
`llat.t:t't'lt| A device that indicates or records
`the total number of pulses received during a tinte interval.
`l
`'pols ,kaL'tnt-or l
`Solid-liquid countercur-
`lent-:M use]
`pulsed-bed sorption
`rcnt adsorption process (such as an ion—exchange process} in
`which the granulated solids bed and the solution Ilow alter—
`nately. in opposite directions.
`{
`'polst :bed 'sorp'slton }
`pulse decay time
`It‘oMMtINI The interval of time required
`for the trailing edge of a pulse to decay front 90% to lust. of
`the peak pulse atnplitude.
`{
`'pals tli'ka ,titn }
`pulse-delay network [H.I-Lt'l'tt] A network consisting of two
`or more components such as resistors. coils. and capacitors.
`used to delay the passage of a pulse,
`{
`'pols di'la 'net,wark }
`pulse demoder
`[t'UMMUNI
`Circuit
`that responds only to
`pulse signals having the specified spacing between pulses for
`which the device is adjusted. Also known as constant-delay
`discriminator.
`{
`'polsdilmod'or }
`A discriminator circuit that
`pulse discriminator
`IIEIJEt'I'R]
`responds only to a pulse having a particular duration or ampli—
`tude.
`{
`'pals di,skrim-o,nad-ar}
`pulsed laser
`IOP'I'ICS] A laser in which a pulse of coherent
`light is produced at fixed time intervals. as required for ranging
`and tracking applications or to permit higher output power than
`can be obtained with continuous operation.
`{
`'palst 'la-zor }
`pulsed light
`[otrt'tt‘s]
`A beam of light whose intensity is
`modulated itt sortie prescribed manner: analogous to a radar
`pulse.
`{
`'polst ‘lit }
`pulsed-light ceilometer Sec pulsed—light cloud—height indica—
`tor.
`{
`'palst 'lit se'liini-od-or }
`|t—;Nti] An instrument
`pulsed-light cloud-height indicator
`used for the determination of cloud heights: it operates on the
`principle of pulse radar. employing visible light rather than
`radio waves. Also known as pulsed-light ccilomcter.
`{
`'polst
`'lit ‘klat‘td Ihit 'in'dolkad'ar }
`Pulse radar that uses the Dop-
`pulse-Doppler radar
`[ENG]
`pler effect to obtain information ahout the velocity of a target.
`l
`'pals :dap-lar 'ralda'r }
`pulsed oscillator
`IELlit’l'lvt] An oscillator that generates a
`carrier-frequency pulse or a train ofcarrier-l‘rcqucney pulses as
`the result of self—generated or externally applied pulses.
`{
`'palst 'a's-allad-or}
`IENGI A soldering iron that pro—
`pulse dot soldering iron
`vides heat to the tip for a precisely controlled time interval. as
`required for making a good soldered joint without overheating
`adjacent parts.
`{
`'pals .diit 'siid-a-ritj ,i'orn }
`in
`reactor
`pulsed reactor
`[NUCLEO]
`A research nuclear
`which continual short. intense sttrgcs of power and radiation
`can be produced: the neutron flux during the surge is ntuch
`higher than could be tolerated during steady—state operation.
`l
`'palst re'ak-tor }
`
`[lELlit‘TR] A distortion of an otherwise essen—
`pulse droop
`tially flat-topped rectangular pulse, characterised by a decline
`ofthe pulse top.
`{
`'pols ,driip }
`pulsed ruby laser
`[ot’rtcsl A laser in which ruby is used as
`the active material; the extremely high pumping power required
`is obtained by discharging a bank of capacitors through a special
`high—intensity flash tube. giving a coherent beam that lasts for
`about 0.5 millisecond.
`{ ‘polst 'rii-be 'la-zar }
`pulsed transfer function
`IcoNT svs]
`The ratio of the :—
`transform of the output of a system to the :—transform of the
`input. when both input and output are trains of pulses. Also
`known as discrete transfer
`function:
`:—transfer
`function.
`I
`'polst 'tranrlnr ,fagk‘shan }
`The time interval between the
`pulse duration
`[L'OMMUNI
`first and last
`instants at which the instantaneous amplitude
`reacltes a stated fraction of the peak pulse amplitude. Also
`known as pulse length: pulse width (both deprecated usages].
`{ ‘pols dt't'ra-shan }
`'kt‘xl-ar }
`{ 'pals dlil:ri_1'5l'lall
`pulse-duration coder Sec Coder.
`[ELECI‘RI A circuit in which
`pulse-duration discriminator
`the sense and magnitude of the output are a function of the
`deviation of the pulse duration from a reference.
`{
`'pols dulra-
`shan di’skrim-omt‘td-or }
`ICOMMUNI Modulation of a
`pulse-duration modulation
`pulse carrier wherein the value of each instantaneous sample
`of a modulating wave produces a pulse of proportional duration
`by varying the leading.
`trailing. or both edges of a pulse.
`Abbreviated PDM. Also known as pulse—length modulation:
`pulse—width ntodulation.
`{ 'pols dufra-shan ,miij-ada'shan }
`pulse-duration modulation—irequency modulation
`[common]
`System in which pulse—duration—modulated sub-
`carriers are used to frequency-modulate a second carrier. Also
`known as pulse—width modulation—frequency modulation.
`{ 'pols dulra-shon ,miij-alla-shan 'fre'kwsn-se ,rniij-aJé‘shan }
`pulsed vldeo thermography
`IENGI
`A method of nonde—
`structive testing in which a source of heat is applied to an area
`of a specimen for a very short time duration. and an infrared
`detection system reveals anomalously hot or cold regions that
`then appear close to defects.
`{ 'palst 'vid'é-o thar'mag‘ro-fe }
`pulse-echo method
`[MET] A nondestructive test in which
`pulses of energy are directed into a pan. and the time for the
`echo to return from one or more surfaces is measured.
`{
`'pals
`:ek-o lmeth-ad }
`pulse lorI'n
`[PH't'sl The amplitude of a pulse plotted as a
`function of time.
`{ 'pals ,form }
`pulse-forming network
`[lit .EE'TRI
`A network used to shape
`the leading or trailing edge of a pulse.
`{ 'pols :form-it]
`'net,work }
`[common] A form of pulse—
`pulsetrequency modulation
`
`time modulation in which the pulse repetition rate is the char—
`acteri: 'c varied. Abbreviated PFM.
`{
`'pals :fré-kwon-sé
`,miij-aJa-shan }
`pulse-frequencyI spectrum See pulse spectntm.
`kwon'se ,spek-tram }
`[ELECTR]
`See impulse generator.
`pulse generator
`|t~'.t.t—:(.‘|
`A generator that produces repetitive pulses or signal—initiated
`pulses.
`{ ’pols ,jcn-a,rad-or}
`'pols ,gr'tip }
`{
`pulse group See pulse train.
`pulse hardening
`[MtiTI A surface-hardening process per—
`formed by heating to the required temperature in a span of
`several milliseconds by using an energy and time—controlled
`pulse of very high power at a very high frequency. about 2?
`megahertz.
`l
`'pals :hiird'an'in }
`pulse height
`{ELECTRI The strength or amplitude ofa pulse.
`measured in volts.
`{ 'pols ,hit }
`pulse-height analyzer
`[aucteol An instrument capable of
`indicating the number of occurrences of pulses falling within
`each of one or more specified amplitude ranges: used to obtain
`the energy spectrum of nuclear radiations. Also known as
`kick—sonertBritish usage): multichannel analyzer.
`{
`'pals lhit
`'an'alliz-ar }
`that pro—
`A circuit
`|E1.F.CTRI
`pulse-height discriminator
`duces a specified output pulse when and only when it receives
`an input pulse whose amplitude exceeds an assigned value.
`Also known as amplitude discriminator.
`{
`'pols ,hit di‘skrim-
`o,ru‘td-ar }
`lenient] A circuit that produces a
`pulse-height selector
`specified output pulse only when it receives an input pulse
`whose amplitude lies between two assigned values. Also
`
`{ 'pals lire-
`
`PU LSE-DURATION
`MODULATION
`
` tat)
`
`lime —)
`
` lb)
`
`Ilme -v—é
`
`guard interval
`
`
`
`Types of pulse-duration
`modulation. (a) Trailing edge
`modulated. leading edge fixed.
`(bl Leading edge modulated,
`trailing edge fixed. [cl Both edges
`modulated. Solid lines indicate
`duration of unmodulated pulses,
`shaded areas limits of maximum
`modulation. (From H. S. Black.
`Modulation Theory. Van
`Nostrand. 1953}
`
`PULSE GENERATOR
`n.0, at“ harps
`(exaggerated)
`
`'
`
`v.
`
`4——
`
`r
`
`
`Thyratron pulse generator. an
`example of a pulse generator
`having a controllable pulse width.
`Tube T-l fires when positive
`triggering pulse is a
`lied.
`charging capacitor
`k to some
`positive potential ”Pr which
`then slowly decreases as C}:
`discharges through resistor R _
`Grid G2 of tube T—2 rises unti
`it. becomes suificiently positive to
`fire T-2. which then acts as a low
`impedance across Ck discharging
`it. to near ground potential.
`
`

`

`rier
`
`lpir'é'
`
`ation.
`
`of a
`ample
`pulse
`viated
`]
`'pals
`
`e sys—
`
`g Iluid
`vapor—
`. trans—
`1—volt-
`owave
`
`ids out
`in with
`:eption
`:1.diir }
`1g fast
`ulse of
`suiting
`'e'sas }
`artery
`
`which
`e mag-
`-a-rir] }
`Is ri'ke'
`
`etween
`3 recip—
`n }
`:storing
`titudes.
`
`'. pulses
`tes into
`1 wave-
`srilped'
`
`{ 'pels
`
`nes per
`Also
`
`aquency
`tired for
`the peak
`
`tput sig-
`:ceived.
`
`sting the
`{ lpals
`
`ging one
`;cnerator
`
`lg points
`{
`'pals
`
`)f pulse—
`d. Also
`Imaj-ani'
`
`)n of the
`je and in
`pectrum.
`
`iduces an
`the input
`tmplitude
`
`'equency-
`
`pulse synthesizer
`
`pumping frequency I
`
`1523
`
`{
`
`'pols Itip al'tim-
`
`modulation carriers modulating a radio—frequency carrier. each
`of which is in turn pulse—modulated.
`{ ’pals 'sab,kar'é‘ar }
`pulse synthesizer
`[ELEL’I'R] A circuit used to supply pulses
`that are missing from a sequence due to interference or other
`causes.
`{ ‘pals .sin-tha,siz-ar }
`A radiosonde
`IIENG]
`pulse-time-modulated radiosonde
`which transmits the indications of the meteorological sensing
`elements in the form of pulses spaced in time; the meteorolog-
`ical data are evaluated from the intervals between the pulses.
`Also known as time—interval radiosonde.
`{ ‘pals :tim :maj-
`o,lad-ad 'rad-e-o,siind }
`pulse-time modulation [cosmos] Modulation in whichthe
`tinte of occurrence of some characteristic of a pulse carrier is
`varied from the unmodulated value: examples include pulse—
`duration. pulse—interval. and pulse—position modulation.
`Ab—
`breviated PI'M.
`{ 'pels :tim ,mfijalla-shon }
`pulse tracking system [ENG]
`'l‘racking system which uses
`a high—energy. short—duration pulse radiated toward the target
`from which the velocity, direction. and range are determined
`by the characteristics of the reflected pulse.
`l
`'pals 'trak-ig
`Isis-tam }
`[PHYS] A series of regularly recurrent pulses
`pulse train
`having similar characteristics. Also known as pulse group.
`{ 'pols ,tran }
`A Fourier analysis of a
`[cosmos]
`pulse-train analysis
`pulse train.
`{
`'pals :tran alnal-a-sas }
`pulse translorrnel'
`lthtiCTR] A transformer capable of oper—
`ating over a wide range of frequencies. used to transfer nonsi—
`nusoidal pulses without materially changing their waveforms.
`{
`'pals tranzlfOr-mar }
`pulse transmitter
`[ELECTR] A pulse-modulated transtnitter
`whose peak—power—outpUI capabilities are usually large with
`respect to the average-power—output rating.
`{
`'pals lt'anz'rnid‘
`ar }
`pulse-type altimeter Sec radar altimeter.
`ad-ar }
`transmission
`Signal
`[cosmos]
`pulse-type telemetering
`system with pulses as a function of lime. but independent of
`electrical magnitude: in a pulse—counting system the number of
`pulses per unit time corresponds to the measured variable: in
`pulse—width or pulse—duration types. the length of the pulse is
`controlled by the measured variable.
`{
`'pals :lip ,lel'a,méd‘a-
`rip }
`}
`'pols ,vt'tl-tij
`{
`pulse voltage See impulse voltage.
`pulse wave
`IPHYSIO] A wave of increased pressure over the
`arterial system. started by contraction of septum and valves in
`the heart.
`{ 'pals ,wav }
`'pols ,widlh }
`{
`pulse width See pulse duration.
`pulse-width discriminator
`[ELHC‘TRJ Device that measures
`the pulse length of video signals and passes only those whose
`time duration falls into some predetermined design tolerance.
`I
`'pals :width di'skrim-omad'ar }
`[ELEC] A variation
`pulse-width modulated static Invader
`of the quasi—square—wave static inverter. operating at high fre—
`quency.
`in which the pulse width. and not the amplitude. of
`the square wave is adjusted to approximate the sine wave.
`{
`'pels {width fnta'j'oJad-od 'stad-ik inlvnrd-ar }
`modulation.
`pulse-width modulation Sec
`pulse-duration
`{
`'pals {width ,miij-aJa-shan }
`pulse-width modulation—frequency modulation Sec pulse—
`duration modulation—frequency modulation.
`{
`'pals :width
`.m'aj'alla‘shan 'fre-kwan-sé ,miij-alla-shan }
`pulse window See mean profile.
`{
`'pals ,win-do }
`pulsing key
`IcoMMtINI
`1. Method of passing voice fre—
`quency pulses over the line under control of a key at the original
`office; used with E and M supervision on intertoll dialing.
`2.
`System of signaling where numbered keys are depressed instead
`of using a dial.
`{ 'pals-in ,ke }
`pulsing transformer
`[cu-r]
`Transformer designed to sup—
`{
`ply pulses of voltage or current.
`'pals-in tranzlftBPmor l
`pulsometer
`IMECH ENG]
`A simple.
`lightweight pump in
`which steam forces water out of one of two chambers alter—
`nately.
`{ pol'siim-od-ar }
`pttltrusion
`IENG] A process for producing continuous fibers
`for advanced composites which involves pulling reinforcements
`through tanks of thermoset resins. a prel'ormer. and then a die.
`where the product is formed into its final shape.
`{ pul'tri't-
`than }
`pulverlte
`
`[l’EI'RI A sedimentary rock composed of sill— or
`
`{
`
`'pam-
`
`clay—sized aggregates of nonclastic origin with a texture simu—
`lating a lutile ol'clastic origin.
`{
`'pal-va,rit l
`pulverization SM comminulion.
`I Ipal'va'ra'x:"t‘shori }
`pulverizer
`[Mh't'tt hurt] Device for breaking down of solid
`lumps into a line material by cleavage along crystal
`faces.
`I
`'pal'valrlz'nr }
`A small cushion or cushionlike pad.
`pulvillus
`[l-NV 7.00]
`ol'ten covered with short hairs. on an insect‘s foot between the
`claws ol' the last segment.
`{ ,pal'vil-as }
`pulvinus
`Ioo't']
`A cushionlike enlargement of the base of a
`petiole which functions
`in
`lurgor movements of
`leaves.
`{
`,pol'vi‘ttas }
`tawny brown
`Felts- t-rmt-otm'. A large.
`puma
`[vi-.tt't zoo]
`wild cat (family Felidae] once widespread over most of the
`Americas. Also known as American lion; catamounl; cougar;
`mountain lion.
`{
`'p'ti-rna }
`pumice
`|(;t-'.ot.| A rock froth. formed by the extreme pulling
`up ol'liquid lava by expanding gases liberated from solution in
`the lava prior to and during solidification. Also known as
`foam: pumice stone: pumicitc: volcanic foam.
`{
`'pam'as }
`pumice fall
`{tit—Lot]
`Pumice falling from a volcano eruption
`cloud.
`{ ‘pom-as lfol
`}
`pumiceous
`|t;tit)l.| Pcnuinirtg to the texture ol'a pyroclastic
`rock. such as purnicc. characterized by numerous small cavities
`presenting a spongy. frothy appearance.
`{ pyii'mish-as }
`pumice stone Sec pumice.
`{
`'poIn-os ,ston }
`pumicite Sec putnice.
`{
`'pam-a.sit }
`pumilith [tarot] A lithified deposit of volcanic ash.
`allilh }
`|t—.'r.t—;t'rtt] Ol‘u parametric device. the source of utter—
`pump
`hating-current power which causes the nonlinear reactor to
`behave as a time-varying reactance.
`[Mtit‘tt I'.N(i|
`A machine
`that draws a fluid into itself through an entrance port and forces
`the fluid out through an exhaust port.
`] pamp l
`pumpability IMATLiRI
`1. The property of a lubricating grease
`that causes it to llow under pressure through lines. nozzles. and
`fillings. 2. The ability of any liquid. slurry. or suspension to
`be moved through a flow conduit by pressure from a pump.
`{ ,pani-pa‘bil-ad't': lb
`[tasttl Standard test to ascertain the lowest
`pumpability test
`temperature at which a petroleum fuel oil may be putnped.
`{ ,pam'pa'bil‘atl‘é Itest }
`A system or process vessel that
`pumparound
`lt'IIt-LM ILNUI
`moves quuid out ol‘and back into the vessel at a new location:
`for example. in a bubble tower. the withdrawing of liquid from
`a plate or tray. followed by cooling. and reluming to another
`plate to induce condensation of vapors.
`{ 'pant'palruund }
`pump bob IMl-I'll cool A device such as a crank that converts
`rotary motion into reciprocating motion.
`{
`'pamp ,biib }
`pump-down time
`Item] The length oftime required toevac—
`uale a leak-tested vessel.
`{ 'pomp 'dat‘tn ,tim }.
`pumped hydroelectric storage Il-Il.l:('] A method ol'cnergy
`storage in which excess electrical energy produced at times of
`low demand is used to pump water into a reservoir. and this
`water is released at times of high demand to operate hydro—
`electric generators.
`{
`'pampt :hi'drt'ri'lek'trik 'stt‘inij
`}
`
`pumped tube |l-:I
`' TR] Anclcclrtm tube that is continuously
`connected to evacuating equipment during operation:
`large
`pail—cathodetubcs are often operatedinthis manner.
`{
`'pompt
`.tiih }
`t.‘a_.Al_.Si.0._.t0H) A greenish cp—
`[MINERAL]
`pumpellyite
`idotclike mineral that is probably related to clinozoisite. Also
`known as Iotrite: xonochlorite.
`{
`.pam'pel'efil l
`A variety of
`pumpellyite-prehnite-quartz tacies
`[PI-.‘I'RI
`low—temperature. moderate—pressure metamorphism.
`{ :pam
`‘pel-elit :pralnit :kworts 't'a-shC‘r }
`pumphouse
`lt'tv ItNtil
`A building in which are housed
`pumps that supply an irrigation system. a power plant. a fac-
`tory. a reservoir. a farm. a home. and so on.
`l
`'pomp.haus }
`pumping
`|l-'I_ Mtit‘ltl Unsteadincss of the mercury in the
`barometer. caused by fluctuations of the air pressure produced
`by a gusty wind or due to the motion of a vessel.
`lt'rt‘rsl
`1.
`The application ol'oplical. infrared. or microwave radiation of
`appropriate frequency to a laser or muscr medium so that ab-
`sorption of the radiation increases the population of atoms or
`molecules in higher energy states. Also known as electronic
`pumping. 2. The retnoval of gases and vapors frotrt a vacuum
`system.
`{
`'pamp-in }
`pumping frequency |I-:t.I-:t."I'R| Frequency at which pumping
`
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