Medical Dictionary

radioactivity

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

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
March 27, 2015
quiescent Hear it
Tranquilly at rest or causing no trouble
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