radioisotope Hear it!

radioisotope definition

radio·iso·tope (rā′dē ō ī′sə tōp′)

noun

a naturally occurring or artificially created radioactive isotope of a chemical element: used in medical therapy, biological research, etc.

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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