isoprene

noun

iso·​prene ˈī-sə-ˌprēn How to pronounce isoprene (audio)
: a flammable liquid unsaturated hydrocarbon C5H8 used especially in synthetic rubber

Examples of isoprene in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Trees emit natural volatiles like isoprene and monoterpenes, which can spark cloud-forming chemical reactions. — WIRED, 29 Sep. 2023 As for the isoprene, this is believed to be released by muscle activity - perhaps the isoprene peaks reflects people moving or 'fidgeting' in tension. — Neuroskeptic, Discover Magazine, 12 May 2016

Word History

Etymology

probably from is- + propyl + -ene

First Known Use

1860, in the meaning defined above

Time Traveler
The first known use of isoprene was in 1860

Rhymes for isoprene

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Browse Nearby Words

isoprenaline
isoprene
isoprenoid
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Cite this Entry

“Isoprene.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/isoprene. Accessed 24 Apr. 2025.

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Kids Definition

isoprene

noun
iso·​prene ˈī-sə-ˌprēn How to pronounce isoprene (audio)
: a compound used especially in making synthetic rubber

Medical Definition

isoprene

noun
iso·​prene ˈī-sə-ˌprēn How to pronounce isoprene (audio)
: a flammable liquid unsaturated hydrocarbon C5H8 used especially in synthetic rubber

More from Merriam-Webster on isoprene

Britannica.com: Encyclopedia article about isoprene

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