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Meaning of radioactive

ra•di•o•ac•tive

Pronunciation: (rā"dē-ō-ak'tiv), [key]
— adj. Physics, Chem.
  1. of, pertaining to, exhibiting, or caused by radioactivity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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