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 REM²

First recorded in 1955–60

Example Sentences

During REM sleep, both hormones increase, leading to a surge in growth hormone.

From Science Daily

REM sleep involves intense dreaming and brain activity that resembles wakefulness, yet people often report that this stage still feels like deep sleep.

From Science Daily

Rem Koolhaas’s addition to the New York institution respects the original building while seamlessly uniting the interiors of both structures, doubling the museum’s exhibition space.

From The Wall Street Journal

If you were looking for an architect to revisit a building, Rem Koolhaas would not be your first choice.

From The Wall Street Journal

Dutch architect Rem Koolhaas is less enthusiastic.

From BBC