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

"It was REM's interpretation of it that I knew," he said.

From BBC

Previously, Adele, REM and the Rolling Stones are among the big names who have demanded he doesn't use their songs.

From BBC

Results showed apnea events during REM to be a critical factor contributing to verbal memory decline, especially among individuals with a genetic predisposition to Alzheimer's and those with a parental history of the disease.

From Science Daily

Women also entered REM sleep, characterised by high levels of brain activity and vivid dreaming, earlier than men.

From Science Daily

The neuron density of its forebrain — the region engaged with planning, sensory processing, and emotional responses, and on which REM sleep is largely dependent — is comparable to that of primates.

From New York Times