See under isomerism(def 1).
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Question 1 of 10
Origin of structural isomerism
First recorded in 1925–30
Words nearby structural isomerism
Definition for structural isomerism (2 of 2)
[ ahy-som-uh-riz-uh m ]
/ aɪˈsɒm əˌrɪz əm /
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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for structural isomerism
/ (aɪˈsɒməˌrɪzəm) /
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
Medical definitions for structural isomerism (1 of 2)
[ ī-sŏm′ə-rĭz′əm ]
The phenomenon of the existence of isomers.
The complex of chemical and physical phenomena characteristic of or attributable to isomers.
The state or condition of being an isomer.
Medical definitions for structural isomerism (2 of 2)
Isomerism involving the same atoms in different arrangements.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.