rem

¹

[ rem ]

noun

, Nucleonics.

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

REM

²

[ rem ]

noun

1. rapid eye movement.

REM

¹

abbreviation for

1. rapid eye movement

REM

²

/ rɛm /

acronym for

1. roentgen equivalent man

rem

/ 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.

rem

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

Notes

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

Word History and Origins

Origin of rem¹

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

Origin of rem²

First recorded in 1955–60

Example Sentences

In 2008, R.E.M. roared back to life with the well-received Accelerate.

From The Daily Beast

But unlike so many rock-group breakups before, R.E.M. managed to sidestep cliché even while parting company.

From The Daily Beast