radioactivity

English dictionary entry

Meanings

noun

Spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
The radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc.

/ˌreɪdɪəʊakˈtɪvɪti/ LL-Q1860 (eng)-Vealhurl-radioactivity.wav

radioactivity radioactivities radio-activity

From radioactive + -ity or radio- + activity.

activity nuclear radiation radiation radiation poisoning radio- radioactive decay becquerel curie half-life

nonradioactivity

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