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isomerism

[ ahy-som-uh-riz-uhm ]
/ aɪˈsɒm əˌrɪz əm /
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noun
Chemistry. the relation of two or more compounds, radicals, or ions that are composed of the same kinds and numbers of atoms but differ from each other in structural arrangement (structural isomerism ), as CH3OCH3 and CH3CH2OH, or in the arrangement of their atoms in space and therefore in one or more properties.Compare optical isomerism, stereoisomerism.
Also called nuclear isomerism. Physics. the relation of two or more nuclides that have the same atomic number and mass number but different energy levels and half-lives.
Chemistry, Physics. the phenomenon characterized by such a relation.
the state or condition of being isomerous.
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Origin of isomerism

First recorded in 1830–40; isomer(ic) + -ism
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use isomerism in a sentence

British Dictionary definitions for isomerism

isomerism
/ (aɪˈsɒməˌrɪzəm) /

noun
the existence of two or more compounds having the same molecular formula but a different arrangement of atoms within the moleculeSee also stereoisomerism, optical isomerism
the existence of two or more nuclides having the same atomic numbers and mass numbers but different energy states
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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