isomer

noun

iso·​mer ˈī-sə-mər How to pronounce isomer (audio)
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 This is possible since both Delta 8 is technically an isomer of CBD. Amber Smith, Discover Magazine, 3 Apr. 2024 The resulting compound includes non-natural THC isomers generated during the hydrogenation process. Dario Sabaghi, Forbes, 20 Feb. 2024 Advertisement In 2019, the Food and Drug Administration approved a version of ketamine (ketamine is made up of two isomers, or molecules, that can be split apart) called esketamine, for treatment of depression. Anita Chabria, Los Angeles Times, 22 Dec. 2023 In the wake of that move some in the cannabis industry began experimenting with ways to extract THC isomers from cannabidiol (CBD), a non-intoxicating compound which is found in abundance in hemp. Dale Ellis, Arkansas Online, 21 Aug. 2023 These restrictions aim to prevent minors from accessing or using substances that contain THC isomers. Amber Smith, Discover Magazine, 14 July 2023 Like Delta 9 THC, Delta 8 produces many of the same effects as its isomer. Amber Smith, Discover Magazine, 20 Sep. 2022 For example, technetium-99m is an isomer of technetium-99. Artemis Spyrou, The Conversation, 24 May 2022 This allows the molecule to turn into an energy-rich isomer. Joshua Hawkins, BGR, 15 Apr. 2022

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'isomer.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

International Scientific Vocabulary, back-formation from isomeric

First Known Use

1855, in the meaning defined at sense 1

Time Traveler
The first known use of isomer was in 1855

Dictionary Entries Near isomer

Cite this Entry

“Isomer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isomer. Accessed 24 Jul. 2024.

Kids Definition

isomer

noun
iso·​mer ˈī-sə-mər How to pronounce isomer (audio)
: one of two or more chemical compounds or groups that have the same numbers of atoms of the same elements but differ in structure
isomeric
ˌī-sə-ˈmer-ik
adjective
isomerism
ī-ˈsäm-ə-ˌriz-əm
noun

Medical Definition

isomer

noun
iso·​mer ˈī-sə-mər How to pronounce isomer (audio)
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

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