rem

[ rem ]

/ rɛm /

noun Nucleonics.

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

Nearby words

Origin of rem

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

REM

[ rem ]

/ rɛm /

noun

rapid eye movement.

Origin of REM

First recorded in 1955–60

ad rem

[ ad rem; Latin ahd rem ]

/ æd ˈrɛm; Latin ɑd ˈrɛm /

adjective

relevant; pertinent: an ad rem remark.

adverb

without digressing; in a straightforward manner: to reply ad rem.

Origin of ad rem

< Latin: literally, to the matter

in rem

[ in rem ]

/ ɪn ˈrɛm /

adverb, adjective Law.

(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. 2019

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|DailyBurn|October 17, 2014|DAILY BEAST
My scores for light, deep, and REM sleep were well within normal, but I still felt sleepy in the morning.
How I Finally Got to the Bottom of My Insomnia|Gregory Ferenstein|June 26, 2014|DAILY BEAST
It is the only popular consumer technology to measure both REM (which restores the mind) and deep sleep (which restores the body).
How I Finally Got to the Bottom of My Insomnia|Gregory Ferenstein|June 26, 2014|DAILY BEAST
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’|Melissa Leon|June 1, 2014|DAILY BEAST

The most recent service opened with the REM song “Everybody Hurts.”
Atheist Ex-Pastor Jerry DeWitt’s Mission to Red America|David Masciotra|November 17, 2013|DAILY BEAST
The same writer very justly remarks that the Scriptural and Talmudical accounts of the Rem have one decided distinction.
Bible Animals;|J. G. Wood
"Rem acu tetigisti, my dear," said my father, borrowing Cicero's pun on the occasion.
Blackwood's Edinburgh Magazine, Volume 65, No. 399, January 1849|Various
Sermnem erum ex servs nus excpit; rem ad cnsuls dtulit.20 Datae15 ad Tarquinium ltterae manifstum facinus fcrunt.
Selections from Viri Romae|Charles Franois L'Homond
In admiralty proceedings in rem, bail is often required for procuring the release of arrested ships or cargo.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2|Various
"'Rem acu tetigisti,' my dear," said my father, borrowing Cicero's pun on the occasion.
The Caxtons, Complete|Edward Bulwer-Lytton

British Dictionary definitions for rem

REM

abbreviation for

rapid eye movement

REM

rem

/ (rɛm) /

n acronym for

roentgen equivalent man

ad rem

/ Latin (æd ˈrɛm) /

adjective, adverb

to the point; without digressionto reply ad rem; an ad rem discussion Compare ad hominem

in rem

/ (ɪn ˈrɛm) /

adjective

law (of a judicial act) directed against property rather than against a specific personCompare in personam

Word Origin for in rem

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

rem

"unit for measuring radiation," 1947, acronym of roentgen equivalent man.

Medicine definitions for rem

rem

[ rĕm ]

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

Science definitions for rem

rem

[ rĕm ]

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.

Culture definitions for rem

rem

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.