isomer

[ ahy-suh-mer ]
/ ˈaɪ sə mər /

noun

Chemistry. a compound displaying isomerism with one or more other compounds.
Also called nuclear isomer. Physics. a nuclide that exhibits isomerism with one or more other nuclides.

Origin of isomer

First recorded in 1865–70; back formation from isomeric

Words nearby isomer

isologue, isolysin, isolysis, isomagnetic, isomaltose, isomer, isomerase, isomeric, isomerism, isomerization, isomerize

Example sentences from the Web for isomer

British Dictionary definitions for isomer

isomer
/ (ˈaɪsəmə) /

noun

chem a compound that exhibits isomerism with one or more other compounds
physics a nuclide that exhibits isomerism with one or more other nuclides

Derived forms of isomer

isomeric (ˌaɪsəˈmɛrɪk), adjective

Medical definitions for isomer

isomer
[ ī′sə-mər ]

n.

Any of two or more substances that are composed of the same elements in the same proportions but differ in properties because of differences in the arrangement of atoms.
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 words from isomer

i′so•mer′ic (-mĕr′ĭk) adj.

Scientific definitions for isomer

isomer
[ ī′sə-mər ]

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.
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.