■ noun ( plural same) a unit of effective absorbed dose of ionizing radiation in human tissue, loosely equivalent to one roentgen of X-rays.
Origin
1940s: acronym from roentgen equivalent man .
■ noun ( plural same) a unit of effective absorbed dose of ionizing radiation in human tissue, loosely equivalent to one roentgen of X-rays.
Origin
1940s: acronym from roentgen equivalent man .
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004