rem

¹ American  

[rem] / rɛm /

noun

Nucleonics.

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

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REM ² American  

[rem] / rɛm /

noun

1. rapid eye movement.

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REM ¹ British  

abbreviation

1. rapid eye movement

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REM ² British  

/ rɛm /

acronym

1. roentgen equivalent man

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rem Scientific  

/ rĕm /

1. 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.

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rem Cultural  

1. An acronym for r oentgen e quivalent m an. A unit of absorbed doses of radiation.

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Discover More

A normal medical x-ray delivers about 0.02 rem; a fatal dose of radiation is several thousand rem.

Etymology

Origin of rem¹

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

Origin of REM¹

First recorded in 1955–60

Example Sentences

“People are saying ‘I know I only got 30 minutes of deep sleep and an hour of REM.

From The Wall Street Journal

The joke is on us, of course, and especially me, who lost out on at least an hour of extra REM and now has to find a cranky cat and trim her claws.

From The Wall Street Journal

Wilders’s fate is a warning, says Rem Korteweg, senior fellow of the Clingendael Institute think tank, that in the fragmented political systems of many European countries today, many of whom are governed by coalitions, voters can quickly turn on parties that don’t bring results.

From The Wall Street Journal

Dutch architect and theorist Rem Koolhaas might have part of the answer.

From Salon

The second season’s opening episodes drag like an inescapable, non-refreshing REM state.

From Salon