rem

[ rem ]
/ rɛm /

noun Nucleonics.

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)

Definition for rem (2 of 4)

REM

[ rem ]
/ rɛm /

noun

Origin of REM

First recorded in 1955–60

Definition for rem (3 of 4)

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

Definition for rem (4 of 4)

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

British Dictionary definitions for rem (1 of 4)

REM

1

abbreviation for

rapid eye movement

British Dictionary definitions for rem (2 of 4)

REM

2

rem

/ (rɛm) /

n acronym for

roentgen equivalent man

British Dictionary definitions for rem (3 of 4)

ad rem

/ Latin (æd ˈrɛm) /

adjective, adverb

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

British Dictionary definitions for rem (4 of 4)

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

Medicine definitions for rem (1 of 2)

rem

[ rĕm ]

n.

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

Medicine definitions for rem (2 of 2)

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.

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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.
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.