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[noo-klahyd, nyoo-] /ˈnu klaɪd, ˈnyu-/
noun, Physics.
an atomic species in which the atoms all have the same atomic number and mass number.
an individual atom in such a species.
Origin of nuclide
1945-50; nucl(eo)- + -ide < Greek eîdos shape Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for nuclide


a species of atom characterized by its atomic number and its mass number See also isotope
Word Origin
C20: from nucleo- + -ide, from Greek eidos shape
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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Word Origin and History for nuclide

1947, from nucleus + -ide.

Online Etymology Dictionary, © 2010 Douglas Harper
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nuclide in Medicine

nuclide nu·clide (nōō'klīd', nyōō'-)
A type of atom specified by its atomic number, atomic mass, and energy state, such as carbon 14.

nu·clid'ic (nōō-klĭd'ĭk, nyōō-) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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nuclide in Science
An atomic nucleus identified by its atomic element and its mass number. For example, a carbon-14 nuclide is the nucleus of a carbon atom, which has six protons, with mass number 14 (thus having eight neutrons). See also isotope.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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