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Medical Dictionary

radioactivity

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

Medical Definition of radioactivity

plural radioactivities

  1. :  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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a division or portion of a pool or whole

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