isomerism

noun

isom·​er·​ism ī-ˈsä-mə-ˌri-zəm How to pronounce isomerism (audio)
1
: the relationship of two or more chemical species that are isomers
2
: the relation of two or more nuclides with the same mass numbers and atomic numbers but different energy states and rates of radioactive decay

Word History

First Known Use

1838, in the meaning defined at sense 1

Time Traveler
The first known use of isomerism was in 1838

Dictionary Entries Near isomerism

Cite this Entry

“Isomerism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isomerism. Accessed 13 Apr. 2024.

Medical Definition

isomerism

noun
isom·​er·​ism ī-ˈsäm-ə-ˌriz-əm How to pronounce isomerism (audio)
1
: the relation of two or more chemical species that are isomers
2
: the relation of two or more nuclides with the same mass numbers and atomic numbers but different energy states and rates of radioactive decay

More from Merriam-Webster on isomerism

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!