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)

REM1

abbreviation for

rapid eye movement

British Dictionary definitions for rem (2 of 4)

REM2

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.

notes for rem

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.