isomer

noun
iso·mer | \ ˈī-sə-mər \

Definition of isomer 

1 : one of two or more compounds, radicals, or ions that contain the same number of atoms of the same elements but differ in structural arrangement and properties

2 : a nuclide isomeric with one or more others

Examples of isomer in a Sentence

Recent Examples on the Web

The problem is that many physicists doubt the feasibility of an isomer bomb. David Hambling, Popular Mechanics, "9 Ways the U.S. Could Bomb North Korea's Deepest Bunkers," 12 Sep. 2017 L-alanine and D-alanine are BEST classified as what type of isomers? Brian Whitehead, Orange County Register, "Troy High’s Science Bowl team practicing for redemption at national finals," 14 Feb. 2017 But the military research into isomers still continues. David Hambling, WIRED, "Darpa’s Handheld Nuclear Fusion Reactor," 6 July 2009

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'isomer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of isomer

1855, in the meaning defined at sense 1

History and Etymology for isomer

International Scientific Vocabulary, back-formation from isomeric

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Dictionary Entries near isomer

isoloma

isolux

isomagnetic

isomer

isomerase

isomere

isomeric

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Time Traveler for isomer

The first known use of isomer was in 1855

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More Definitions for isomer

isomer

noun
iso·mer | \ ˈī-sə-mər \

Medical Definition of isomer 

1 : any of two or more compounds, radicals, or ions that contain the same number of atoms of the same elements but differ in structural arrangement and properties

2 : a nuclide isomeric with one or more others

More from Merriam-Webster on isomer

Britannica.com: Encyclopedia article about isomer

Comments on isomer

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occurring twice a year or every two years

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