rem

1 of 2

noun (1)

ˈrem 

: the dosage of an ionizing radiation that will cause the same biological effect as one roentgen of X-ray or gamma-ray exposure

REM

2 of 2

noun (2)

ˈrem 

ˌär-ˌē-ˈem

: rapid eye movement

Word History

Etymology

Noun (1)

roentgen equivalent man

First Known Use

Noun (1)

1947, in the meaning defined above

Noun (2)

1957, in the meaning defined above

Phrases Containing rem

• ad rem
• in rem

Kids Definition

REM

noun

ˈrem 

: rapid eye movement

Medical Definition

rem

1 of 2 noun

ˈrem 

: the dosage of an ionizing radiation that will cause the same biological effect as one roentgen of X-ray or gamma-ray dosage compare rep

REM

2 of 2 noun

ˈrem 

: rapid eye movement