Definition of rem
: the dosage of an ionizing radiation that will cause the same biological effect as one roentgen of X-ray or gamma-ray exposure
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Origin and Etymology of rem
noun
\
ˈrem
,
ˌär-ˌē-ˈem
\
Definition of REM
First Known Use of rem
1957
Medical Dictionary
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Britannica.com: Encyclopedia article about rem
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