electromagnetic unit, emu - any of various systems of units for measuring electricity and magnetism

millicurie - a unit of radioactivity equal to one thousandth of a curie

Ci, curie - a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second

R, roentgen - a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air

rutherford - a unit strength of a radioactive source equal to one million disintegrations per second

REM - (Roentgen Equivalent Man) the dosage of ionizing radiation that will cause the same amount of injury to human tissue as 1 roentgen of X-rays

rad - a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material