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half life

English

  1. 🔊 the time required for something to fall to half its initial value (in particular, the time for half the atoms in a radioactive substance to disintegrate)

Similar words

half-life activity artificial radioactivity contamination curiage decontamination fallout natural radioactivity nuclear radiation radiant energy radiation radioactive radiation radioactivity radiocarbon dating radiolucency radiopacity radiosensibility radiosensitivity saturation point specific activity