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The twitching movements of the eye muscles and other physiological changes that occur during REM sleep.
[r(apid) e(ye) m(ovement).]
1. The amount of ionizing radiation required to produce the same biological effect as one rad of high-penetration x-rays.
2. A unit for measuring absorbed doses of radiation, equivalent to one roentgen of x-rays or gamma rays.
[r(oentgen) e(quivalent in) m(an).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Physiology) rapid eye movement
n acronym for
(General Physics) roentgen equivalent man
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the quantity of ionizing radiation whose biological effect is equal to that produced by one roentgen of x-rays.
[1945–50; r(oentgen)e(quivalent in)m(an)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Short for rapid eye movement. A stage of sleep characterized by twitching movements of the muscles of the eyes and face, faster heartbeat, and increased circulation to the brain. Dreaming takes place during REM sleep.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||REM - a recurring sleep state during which dreaming occurs; a state of rapidly shifting eye movements during sleep|
|2.||REM - (Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays|
radioactivity unit - a measure of radioactivity
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
REM[rem] N ABBR
2. (Phys) =roentgen equivalent man
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005
Collins English/French Electronic Resource. © HarperCollins Publishers 2005
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007
remn (rad, ant) rem m (ant)
REMabbr rapid eye movement. V. movement.
English-Spanish/Spanish-English Medical Dictionary Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.