- the quantity of ionizing radiation whose biological effect is equal to that produced by one roentgen of x-rays.
Origin of rem
1945–50; r(oentgen) e(quivalent in) m(an)
Origin of REM
First recorded in 1955–60
[ad rem; Latin ahd rem]
- relevant; pertinent: an ad rem remark.
- without digressing; in a straightforward manner: to reply ad rem.
Origin of ad rem
< Latin: literally, to the matter
- (of a legal proceeding or judgment) directed against a thing, rather than against a person, as a legal proceeding for the recovery of property.
Compare in personam.
Origin of in rem
1880–85; < Latin: literally, against (the) thing
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for rem
For instance, in active REM sleep, breathing and pulse may be irregular, and small muscular twitches are common.The Tracker That Might Actually Help You Sleep Better
October 17, 2014
My scores for light, deep, and REM sleep were well within normal, but I still felt sleepy in the morning.
It is the only popular consumer technology to measure both REM (which restores the mind) and deep sleep (which restores the body).
But I suppose a kind of longstanding love of specific bands would be Radiohead, Wilco, Neil Young, Tom Waits, REM.Toni Collette on ‘The Realistic Joneses,’‘Lucky Them,’ and Crying in ‘The Sixth Sense’
June 1, 2014
The most recent service opened with the REM song “Everybody Hurts.”Atheist Ex-Pastor Jerry DeWitt’s Mission to Red America
November 17, 2013
He said to a senator, who was the son of a tailor, "Rem acu tetigisti."Curiosities of Literature, Vol. 1 (of 3)
Save me from the lion's mouth: for Thou hast heard me from the horns of Rem.
That the Rem was one of the two animals is certain, and that it was the larger is nearly as certain.
Id quod in rem tuam optumum esse arbitror, ted id monitum advento.Amphitryo, Asinaria, Aulularia, Bacchides, Captivi
Plautus Titus Maccius
His nightmares ran twice: once just before bed, in clairvoyant preview, and again in the depths of REM sleep.Someone Comes to Town, Someone Leaves Town
- rapid eye movement
- roentgen equivalent man
- to the point; without digressionto reply ad rem; an ad rem discussion Compare ad hominem
- law (of a judicial act) directed against property rather than against a specific personCompare in personam
Latin, literally: against the matter
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for rem
"unit for measuring radiation," 1947, acronym of roentgen equivalent man.
Online Etymology Dictionary, © 2010 Douglas Harper
- The amount of ionizing radiation required to produce the same biological effect as one rad of high-penetration x-rays.
- rapid eye movement
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A normal medical x-ray delivers about 0.02 rem; a fatal dose of radiation is several thousand rem.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.