There are 2 main definitions of rem in English:

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rem 1

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noun (plural same)

A unit of effective absorbed dose of ionizing radiation in human tissue, loosely equivalent to one roentgen of X-rays.
Example sentences
  • The modern international system of units includes the Gray, the Sievert, and the Becquerel (Bq); these replace the rad, rem, and Curie, respectively.
  • According to Badhwar, the total increase in cosmonaut exposure was about 6 or 7 rem, a dose equivalent to 100 to 150 days of additional radiation exposure.
  • The rem takes account of a ‘quality factor’, which for the more dangerous alpha particles is 10.


1940s: acronym from roentgen equivalent man.

Words that rhyme with rem

ahem, Belém, Clem, condemn, contemn, crème de la crème, em, gem, hem, Jem, LibDem, phlegm, pro tem, Shem, stem, them

Definition of rem in:

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There are 2 main definitions of rem in English:

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REM 2 Syllabification: REM
Pronunciation: /äːrēːˈem/

Entry from US English dictionary


Rapid eye movement.

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