rad (rad) r adiation a bsorbed d ose: a unit of measurement of the absorbed dose of ionizing radiation, corresponding to an energy transfer of 100 ergs per gram of any absorbing material.
rad
rad (r),
rad
rad 1 (r d)n. A unit of energy absorbed from ionizing radiation, equal to 100 ergs per gram or 0.01 joule per kilogram of irradiated material. |
| rad 2 abbr. radian |
rad
[rad]
abbreviation for radiation absorbed dose.
rad (r),
n a unit of absorbed dose of radiation: 1 r equals 100 ergs/Gm. See also rem.
rad
1. acronym for radiation absorbed dose; a superseded, non-SI unit of measurement of the absorbed dose of ionizing radiation. It corresponds to an energy transfer of 100 ergs per gram of any absorbing material (including tissue). The biological effect of 1 rad of radiation varies with the type of radiation. When the dose is in rem, all types have the same biological effect. Now replaced by the gray.
2. abbreviation for radiograph; used in medical records.
rad
Physics An obsolete unit of ionizing radiation–X-rays, γ rays–corresponding to an energy absorption of 100 ergs/g of tissue. Cf Gray, Roentgen.
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