isomerism

[ ahy-som-uh-riz-uhm ]

/ aɪˈsɒm əˌrɪz əm /

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.

Origin of isomerism

First recorded in 1830–40; isomer(ic) + -ism

Words nearby isomerism

isomagnetic, isomaltose, isomer, isomerase, isomeric, isomerism, isomerization, isomerize, isomerous, isomers, isometric

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for isomerism

A rough illustration of the phenomenon of isomerism is furnished by written language.
The Making of Species|Douglas Dewar
One of the most remarkable phenomena of chemistry is that of isomerism.
The Making of Species|Douglas Dewar
A general philosophical interest is attached to the phenomena of isomerism.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 8|Various
A further distinction is necessary to a survey of the subdivisions of isomerism regarded in its widest sense.
Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 8|Various

Among organisms we sometimes observe a phenomenon which looks very like isomerism.
The Making of Species|Douglas Dewar

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

Medical definitions for isomerism

isomerism

[ ī-sŏm′ə-rĭz′əm ]

n.

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.

单词	isomerism
释义	isomerism [ ahy-som-uh-riz-uhm ] / aɪˈsɒm əˌrɪz əm / 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. Origin of isomerism First recorded in 1830–40; isomer(ic) + -ism Words nearby isomerism isomagnetic, isomaltose, isomer, isomerase, isomeric, isomerism, isomerization, isomerize, isomerous, isomers, isometric Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for isomerism A rough illustration of the phenomenon of isomerism is furnished by written language. The Making of Species\|Douglas Dewar One of the most remarkable phenomena of chemistry is that of isomerism. The Making of Species\|Douglas Dewar A general philosophical interest is attached to the phenomena of isomerism. Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 8\|Various A further distinction is necessary to a survey of the subdivisions of isomerism regarded in its widest sense. Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 8\|Various Among organisms we sometimes observe a phenomenon which looks very like isomerism. The Making of Species\|Douglas Dewar 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 Medical definitions for isomerism isomerism [ ī-sŏm′ə-rĭz′əm ] n. 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. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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