On the cover: Photornicrograph of crystals of vitamin B,.
(Dennis Kunkel, University of Hawall)
Included in this Dictionary are definitions which have been published previously in the following works: P. B.
Jordain, Condensed Computer Encyclopedia, Copyright 0 1%9 by McGraw-Hill, Inc. All rights reserved. J.
Markus, Electronics and Nucleonics Dictionary, 4th ed., Copyright 0 1960, 1966, 1978 by McGraw-Hill, Inc.
All rights reserved. J. Quick, Arrists'and Iflustrators'Encyclopedia, Copyright 0 1969 by McGraw-Hill. Inc. All
rights reserved. Blakiston's Gould Medical Dictionary, 3d ed., Copyright 0 1956.1972 by McGraw-Hill, Inc. All
rights reserved. T. Baumeister and L. S. Marks, eds., Standard Handbookfor Mechanical Engineers, 7th ed.,
Copyright 0 1958,1967 by McGraw-Hill, Inc. All rights reserved.
In addition, material has been drawn fimm the following references: R. E. Huschke, Glossary of Meteorology,
American Meteorological Society, 1959; U.S. Air Force Glossary of Slandaralked Terms, AF Manual 11-1, vol.
1. 1972; Communications-Electronics Terminology, AF Manual 11-1, vol. 3,1970; W. H. Allen. ed., Dictionary
of Technical Terms for Aerospace Use, Ist cd., National Aeronautics and Space Administration, 1965; J. M.
Gilliland, Solar-Terrestrial Physics: A Glossary of Terms andAbbreviations, Royal Aircraft Establishment Tech
nical Report 67158,1967; Glossary qfAir Traffic Control Terms, Federal Aviation Agency; A Glossary qfRange
Terminology, White Sands Missile Range, New Mexico, National Bureau of Standards, AD 467-424; A DOD
Glossary of Mapping, Charting and Geodetic Terms, I st ed., Department of Defense, 1967; P. W. Thrush, comp.
and ed., A Dictionary ofMining. Mineral, and Related Terms, Bureau of Mines, 1968; Nuclear Terms: A Glossary,
2d ed., Atomic Energy Commission; F. Casey, ed., Comipilation of Terms in Infornustion Sciences Technology,
Federal Council for Science and Technology, 1970; Glossary ofStinfo Terminology, Office of Aerospace Research.
U.S. Air Force, 1963; Naval Dictionary ofElectronic, Technical. and Imperative Term, Bureau of Naval Person
net, 1962; ADP Glossary, Department of the Navy, NAVSO P-3097.
McGRAW-HILL DICTIONARY OF SCIENTIFIC AND TECHNICAL TERMS,
Fifth Edition
CopyrightD 1994,1989,1984,1978,1976,1974 by McGraw-Hill. Inc. Ali rights reserved. Printed in the United
States of America. Except as permitted under the United States Copyright Act of 1976. no pan of this publication
may be reproduced or distributed in my form or by my means, or stated in a database or retrieval system, without
the prior written permission of the publisher.
67890 DOWA)OW 03 02 01 00
ISBN 0-07-042333-4
Library of Congress Cataloging-in-Publication Data
McGraw-Hill dictionary of scientific and technical terms
Sybil P. Parker. editor in chief..-5Lh ed.
p. cm.
ISBN 0-07-0423334
I.Science-Dictionaries. 2-Technology-Dictionaries.
1. Parker, Sybil P.
Q123.M34 1993
503-dc2O 93-34772
CIP
INTERNATIONAL EDITION
Copyright 0 1994. Exclusive rights by McGraw-Hill. Inc. for manufacture and export. This book cannot be re
exported front the country to which it is consigned by McGraw-Hill.'Me International Edition is not available in
North America.
When ordering this title, use ISBN 0-07-113584-7.
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