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radionuclide

[rey-dee-oh-noo-klahyd, -nyoo-] /ˌreɪ di oʊˈnu klaɪd, -ˈnyu-/
noun, Physics.
1.
a radioactive nuclide.
Origin
1945-1950
1945-50; radio- + nuclide
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for radio-nuclide

radionuclide

/ˌreɪdɪəʊˈnjuːklaɪd/
noun
1.
a nuclide that is radioactive
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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radio-nuclide in Medicine

radionuclide ra·di·o·nu·clide (rā'dē-ō-nōō'klīd', -nyōō'-)
n.
A nuclide that has artificial or natural origin and that exhibits radioactivity.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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radio-nuclide in Science
radionuclide
  (rā'dē-ō-n'klīd')   
A nuclide that exhibits radioactivity.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Difficulty index for radionuclide

Few English speakers likely know this word

Word Value for radio

6
6
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