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isotone

[ahy-suh-tohn]
noun Physics.
  1. one of two or more atoms having an equal number of neutrons but different atomic numbers.
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Origin of isotone

First recorded in 1930–35; iso- + tone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for isotone

isotone

noun
  1. one of two or more atoms of different atomic number that contain the same number of neutrons
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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

isotone in Medicine

isotone

sə-tōn′)
n.
  1. One of two or more atoms whose nuclei have the same number of neutrons but different numbers of protons.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.