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isotone

American  
[ahy-suh-tohn] / ˈaɪ səˌtoʊn /

noun

Physics.

  1. one of two or more atoms having an equal number of neutrons but different atomic numbers.

isotone British  
/ ˈaɪsəˌtəʊn /

noun

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

"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

Etymology

Origin of isotone

First recorded in 1930–35; iso- + tone

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.