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3 ENTRIES FOUND:

radioactivity

noun ra·dio·ac·tiv·i·ty \-ak-ˈti-və-tē\

Definition of RADIOACTIVITY

:  the property possessed by some elements (as uranium) or isotopes (as carbon 14) of spontaneously emitting energetic particles (as electrons or alpha particles) by the disintegration of their atomic nuclei; also :  the rays emitted

Origin of RADIOACTIVITY

International Scientific Vocabulary
First Known Use: 1899

Rhymes with RADIOACTIVITY

radioactivity

noun ra·dio·ac·tiv·i·ty \-ak-ˈtiv-ət-ē\   (Medical Dictionary)
plural ra·dio·ac·tiv·i·ties

Medical Definition of RADIOACTIVITY

:  the property possessed by some elements (as uranium) or isotopes (as carbon 14) of spontaneously emitting energetic particles (as electrons or alpha particles) by the disintegration of their atomic nuclei

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