| 单词 | radioactivity unit |
| 释义 | radioactivity unit (extremely rare) n WORD FAMILY radioactivity unit n a measure of radioactivity Hypo|Hyper millicurie a unit of radioactivity equal to one thousandth of a curie Ci, curiea unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second Gy, graythe SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad R, roentgena unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air rutherforda 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 rada unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material electromagnetic unit, emu any of various systems of units for measuring electricity and magnetism |
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