isomer
Americannoun
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Chemistry. a compound displaying isomerism with one or more other compounds.
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Also called nuclear isomer. Physics. a nuclide that exhibits isomerism with one or more other nuclides.
noun
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chem a compound that exhibits isomerism with one or more other compounds
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physics a nuclide that exhibits isomerism with one or more other nuclides
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Chemistry Any of two or more substances that have the same molecular formula but differ in their connectivity or spatial arrangement of atoms, or in their topology in macromolecules.
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Physics Any of two or more nuclei with the same mass number and atomic number that have different radioactive properties and can exist in any of several energy states for a measurable period of time.
Other Word Forms
Etymology
Origin of isomer
First recorded in 1865–70; back formation from isomeric
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Vocabulary lists containing isomer
Chemistry - High School
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Organic Chemistry
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Nuclear Processes
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In the fifth step, an isomerase transforms the dihydroxyacetone-phosphate into its isomer, glyceraldehyde-3-phosphate.
From Textbooks ● Jun. 9, 2022
The other isomer, the trans configuration, has the two chloride ligands directly across from one another.
From Textbooks ● Feb. 14, 2019
The trans isomer, formed when the chlorines are positioned at a 180° angle, has very different properties from the cis isomers.
From Textbooks ● Feb. 14, 2019
Only one isomer will fit into opioid receptors in cells.
From Nature ● May 16, 2017
According to this view hyoscyamine ought to be the hyoscinate of hyoscine, or at any rate an isomer of this body.
From Scientific American Supplement, No. 324, March 18, 1882 by Various
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