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May 24, 2013
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Definition of Radionuclide

Radionuclide: An unstable form of a chemical element that radioactively decays, resulting in the emission of nuclear radiation. Also called a radioisotope.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=24809
Last Editorial Review: 6/14/2012

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