Rem (unit)

Dr Daniel J Bell et al.

The rem (an acronym for roentgen equivalent man) was the cgs unit of effective dose and was officially replaced by the sievert many years ago. 

One rem was a large quantity of radiation, and therefore for practical day to day use the millirem (mrem), representing one-thousandth of a rem, was usually employed. 

History and etymology

It is named after Wilhelm Roentgen, the discoverer of x-rays.

Physics and imaging technology: x-ray
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Article information

rID: 58614
Section: Physics
Synonyms or Alternate Spellings:
  • Microrem
  • Millirem
  • Roentgen equivalent man (rem)
  • Roentgen equivalent man (unit)

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