rem

rem

[rem]
noun Nucleonics.
the quantity of ionizing radiation whose biological effect is equal to that produced by one roentgen of x-rays.

Origin:
1945–50; r(oentgen) e(quivalent in) m(an)

Dictionary.com Unabridged

REM

[rem]

Origin:
1955–60

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
REM1
 
abbreviation for
rapid eye movement

REM or rem2 (rɛm)
 
n acronym for
roentgen equivalent man
 
rem or rem2
 
n acronym for

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

rem
"unit for measuring radiation," 1947, acronym of roentgen equivalent man.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

rem (rěm)
n.
The amount of ionizing radiation required to produce the same biological effect as one rad of high-penetration x-rays.

REM abbr.
rapid eye movement

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
rem   (rěm)  Pronunciation Key 
The amount of ionizing radiation required to produce the same biological effect as one rad of high-penetration x-rays. The rem has been replaced in most scientific contexts by the sievert.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

rem definition


An acronym for roentgen equivalent man. A unit of absorbed doses of radiation.

Note: A normal medical x-ray delivers about 0.02 rem; a fatal dose of radiation is several thousand rem.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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FOLDOC
Computing Dictionary

REM definition

programming
(From "remark") The keyword used in BASIC to introduce a comment (which continues to the end of the line). MS-DOS probably borrowed it from BASIC. Might be used in the form "REM out" meaning to comment out.
(1998-04-27)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
rem
roentgen equivalent in man
REM
  1. rapid eye movement

  2. remark

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Britannica
Encyclopedia

rem

unit of radiation dosage (such as from X rays) applied to humans. Derived from the phrase Roentgen equivalent man, the rem is now defined as the dosage in rads that will cause the same amount of biological injury as one rad of X rays or gamma rays. Formerly poorly defined, the rem was redefined in 1962 to clarify the usage of the term relative biological effectiveness (RBE) in both radiobiology and radiation protection

Learn more about rem with a free trial on Britannica.com.

Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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