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`
`Dictionary
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`
` 1.V..
` MCGIfaw-Hill
`SCIENTIFIC _
`and
`- TECHNICAL
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`0f-
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`Sixth Edition
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`San Francisco
`New York Chicago
`Lisbon
`London Madrid Mexico City
`Milan New Delhi
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`those found in meterorites, suggesting that a fireball meteorite or asteroid exploded
`when it hit the Earth, causing maior changes in the environment. {image copyright ©
`Dr. Luann Becker. Reproduced with permissionJ
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`Over the six editions of the Dictionary, material has‘been drawn-from the following references: G. M. Garrity
`et a1., Taxonomic Outline oftlie Procaiyotes. Release 2,” Springer—Verlag, January 2002; D. W. Linzey, Vertebrate
`Biology, McGraerill, 2001; l. A. Pechenik, Biology of the Invertebrates, 4th ed., McGraerill, 2000; US.
`Air Force Glossary ofSromlardized Terms, AF Manual 1171, vol. 1, 1972; F. Casey, ed, Compilation ofTerms
`in information Sciences Technology: Federal Council for Science and Technology, 1970; Communications-
`Electronics Terminology, AF Manual 11-1, vol. 3, 1970; P. W. Thrush, comp. and ed., A Dictionary ofMlm’ng,
`Mineral, and Related Terms, Bureau of Mines. 1968; A DOD Glossary ofMapping, Charting and Geodetic
`Terms, Department of Defense, 1967; J. M. Gilliland. Solar-Terrestrial Physics: A Glossary of Terms and
`Abbreviations, Royal Aircraft Establishment Technical Report 67158, 1967; W. H. Allen, ed., Dictionary of
`Technical Terms for Aerospace Use, National Aeronautics and Space Administration, 1965; Glossary of Stlilfo
`Terminology. Office of Aerospace Research, U.S. Air Force, 1963; Naval-Dictionary of Electmnlc, Technical,
`and lirlperative Terms, Bureau of Naval Personnel, 1962; R. E'. Huscbke;_Glossary of Meteorology, American
`Meteorological Society, 1959; ADP Glossary, Department of the Navy, NAVSO P-3097; Glossary ofAt'r Traffic
`Control Terms, Federal Aviation Agency; A Glossary ofRonge Tcrmlnalogfiall/hitc Sands Missile Rouge, New
`Mexico, National Bureau of Standards, AD 467-424; Nuclear Terms;
`Glossary 2d ed., Atomic Energy
`Commission,
`-
`_
`-
`
`McGRAW-HILL DICTIONARY OF SCIENTIFIC AND TECHNICAL TERMS,
`Sixth Edition
`
`Copyright © 2003, 1994-, 1989, 1984, 1978l 1976. 1974 by The McGraW—Hill Companies, Inc. All rights
`reserved. Printed in the United States of America. Except as permitted under the United States Copyright Act
`of 1976, no part of this publication may be reproduced or distributed in any form or by any means, or stored
`in a database or retrieval system, without the prior written permission of the publisher.
`
`1234567890
`
`DOW/DOW
`
`08765432
`
`ISBN 0-U7e042313—X
`
`Library of Congress Cataloging-in~Publication Data
`
`McGraw-Hill dictionary of scientific and technical termsvoth ed.
`p.
`cm
`ISBN 0—07-042313~X (alk. paper)
`1. Science—-Dictionaries.
`2. TechnologyrDictionarles.
`and technical terms.
`
`I. Title: Dictionary of scientific
`
`
`
`2002026436
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`[BIOL] Referring to a diatom,
`naviculoid
`{no'vik-yodoidl
`Navier’s equation [Miser-i] A vector partial differential
`equation for the displacement Vector of an elastic solid in
`equilibrium and subjected to a body force.
`[ nii'vyaz i,kwa~
`-zhon ]
`[FL MECH] The equations of
`Navier—Stokes equations
`motion for a viscous fluid which may be written dV/clr =
`—(lr'p)Vp + F + vVZV + (1i3)vV(V-V), wherepis the pressure,
`p the density, F the total external force per unit mass, V the
`fluid velocity, and v the kinematic viscosity; for an inconipress~
`ible fluid, the term in V-V (divargencc) vanishes, and the effects
`of viscosity then play a role analogous to that of temperature
`in thermal conduction and to that of density in simple diffusion.
`{ nii'vya ‘stfiks i,kwavzhonz ]
`navigable airspace
`[NAV] Airspace at and above the minis
`mum safe flight level, including airspace needed for safe takeoff
`and landing.
`{ Jnav-i-go-bol ‘cr,spas }
`navigable semicircle
`[METEOROL] That half of a cyclonic
`storm area in which the rotary and progressive motions of the
`storm tend to counteract each other, and the winds are in such
`a direction as to blow a vessel away from the storm track.
`[
`'nav-i'ge'bsl 'sem-i,sorvkol ]
`'nav-o,gad-in ,brij }
`{
`navigating bridge See flying bridge.
`navigating officer
`[NAvl An officer serving as a navigator.
`{ 'nav-o,gitd-i13 1t'if-a-sor}
`navigating sextant
`[NAV] A sextant designed and used for
`observing the altitudes of celestial bodies, as contrasted with
`‘a hydrographic sextant.
`{ ‘nav-a,gad-ig ,sek-stont }
`navigation
`[compurscr]
`In adatabase managementsystem,
`the techniques provided for locating information within the
`system,
`[ENG] The process of directing the movement of a
`craft so that it will reach its intended destination; subprocesses
`are position fixing, dead reckoning, pilotage, and homing.
`[ ,nav-alga-shan }
`navigation accuracy measurement system [NAV] A sim—
`ple height-finding radar system that employs a pulse radar
`with a rotating fan-beam antenna and a curve-fitting method to
`evaluate the accuracy of aircraft altitude-measuring equipment.
`{ ,nav's'gashan 'ak~ya-rovsé 'mezh-or-mont ,sis~tom J
`chart,
`navigational
`aid
`[NAV] An
`instrument,
`device,
`method, or such, intended to assist in the navigation of a craft;
`this expression should not be confused with “aid to naviga—
`tion," which refers only to devices external to a craft.
`{
`,nav-
`o'ga-shon-ol 'ad }
`ENAV] A publication that contains
`navigational almanac
`tabulated positions of astronomical objects at regular intervals
`to enable navigators to determine their position.
`{
`,nav-efga-
`shon‘ai 'ol-niomak}
`{NAV} The four planets commonly
`navigational planets
`observed for obtaining data for Lise in Celestial navigation:
`Venus, Mars, Jupiter, and Saturn.
`{
`,naV‘o'ga-shon'ol
`'plan‘
`ats ]
`[Navi A plot of the movements of a craft.
`navigational plot
`[ ,nav-o‘ga‘shon'al 'plat}
`earths
`artificial
`navigational satellite
`{A1310 ENG] An
`orbiting satellite designed for use in at least four widely differ"
`ent navigational systems.
`{ ,nav'o‘ga-shan-ol ‘sad-ol,it}
`the
`navigational
`triangle
`LNAV]
`In celestial navigation,
`spherical
`triangle solved in computing altitude and"='azi.muth
`and
`great—circle
`sailing
`problems.
`{ ,nav-o'ga-shen-sl
`main-gal }
`[NAV] A computer that uses clecw
`navigation computer
`tronic or electric circuits to compute two or more navigation
`factors such as altitude, direction, and velocity, or to receive
`such data and compute course information.
`[ ,nav-a'ga-shsn
`'kemlpyiid-or }
`{cw ENG] A structure designed to raise the
`navigation darn
`level of a stream to increase the depth for navigation purposes.
`[ ,nav's'ga-shon ,dam ]
`navigation dome See astrodome.
`
`{ ,nav-o'ga‘shsn ,dom}
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`_ i E20 Pae 4
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`,selz ]
`
`boat—shaped,
`
`accordance with international agreements
`,lits ]
`[NAV] A search radar-us
`navigation radar
`marily for navigation purposes, to provide a
`of bearing and distance to any object that: pmJg '
`surface of the water within the range 0 'th
`a'ga-shan 'ra,da’r ]
`[ELECTR] An elec on
`navigation receiver
`determines a ship‘s position by receiving audio
`signals from transmitters at known locatio
`shon rise-var ]
`{NAVJ The d feren
`navigation system error
`aircraft’s true position and the position repoi'
`tion sensors.
`[,nav-o‘ga-shon ,sis-torn '
`navigator
`[NAV] A person who navigates
`responsible for the navigation of a craft._
`navits
`-
`
`crysts of altered olivine, angitc, and bani'c ping;
`groundmass of labradorite and augite.
`NAVSTAR [NAV] A global system of upto-
`satellites developed to provide instantanedus n
`rate worldwide three—dimensional location by air;
`vehicles equipped with suitable receivers. Derivedfr
`tion system using time and ranging.
`Navy Electronics Laboratory international Alg
`See NELIAC.
`[ ‘na-ve i,lek,’tran-iks 'lab-rsitor’
`an-al 'al,gol ksm'pil-srz }
`Navy Heavy See bunker C fuel oil.
`Navy Oceanographic and Meteorological Autom
`[ocsnwooni A 6~meter-long, boat-shaped, moo
`mented buoy. Abbreviated NOMAD.
`nolgraf-ik and ,med-e-o-rolliij-o‘koi iod-a,mad-ilt dif
`Nb See niobium.
`
`n-body problem See many-body problem.'_ -
`,pr€ib-lom}
`NBFi Sec nitrile rubber.
`n-cell
`[MATH] A set that is homeomorphic'either'
`set of points in n-dimeusional euclidean space {n
`whose distance from the origin is less than unity; oriw
`set of points whose distance from the origin is l
`equal to unity
`[
`'en ,sel }
`N center
`[SOLID STATE] A color center which arise
`continued exposure to light in the F band or'to _'ra
`which produces a faint absorption band on the long-'Wavelcn
`side ofthe M band. Also known as G center.
`n-channel
`[nLEcrn] A conduction channel formed-b
`trons in an n-type semiconductor, as in an retype fi'
`transistor.
`[
`'en ,chan-ol]
`n—channel metal-oxide semiconductor See NMQS
`lchain-ail ,med-al :iiklsid ‘seIn-i-kon,dok-tor]
`n-colorable graph [MATH] A graph whose nod .
`colored using one of n colors on each node in such am
`no edge connects a pair of nodes with the same color:
`,kol-o-ro'bol 'gral‘]
`n-component
`[PARTIC PHYS] Cosmic-ray particles the
`take part in nuclear interactions, that is, nucleons, 'pion'S',
`other baryons and mesons.
`[
`'en kom,po-nont }
`n-connected graph
`{MATH} A connected graph for win
`the removal of n points is required to disconnect the. grap .
`{ ‘en kolnek'tod [graf]
`N curve
`[ELECTRJ A plot of voltage against cuchnt to
`negative—resistance device; its slope is negative for some V31
`of current or voltage.
`[
`'en ,karv ]
`Nd Sec neodymium.
`NDGA See nordihydroguaiaretic acid.
`n-dimensional space
`[MATH] A vector space whose bit
`has n vectors.
`[
`'en di‘men-shon-al 'spas }
`N display
`[ELECTR] Radar display in which the targe
`appears as a pair of vertical deflections from a horizont'al:_fimfl
`base; direction is indicated by relatiVe amplitude of the MIPS
`target distance is determined by moving an adjustable pedes _
`signal along the base line until it coincides with the horizonta
`position of the blips; the pedestal control is calibrated
`tance.
`[
`'en di,spla }
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