ole·​fin | \ˈō-lə-fən \

Definition of olefin 

1 : alkene

2 : a synthetic fiber (such as polypropylene) derived from an alkene

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Other Words from olefin

olefinic \ˌō-​lə-​ˈfi-​nik \ adjective

Examples of olefin in a Sentence

Recent Examples on the Web

Wu said the joint venture has secured long-term purchase contracts from Chinese companies that convert methanol into olefins. Hal Bernton, The Seattle Times, "Meet the Chinese businessman behind the $1.8B plan to make methanol in Washington state," 5 July 2017

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

First Known Use of olefin

1860, in the meaning defined at sense 1

History and Etymology for olefin

International Scientific Vocabulary, from French (gaz) oléfiant ethylene, from Latin oleum

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Time Traveler for olefin

The first known use of olefin was in 1860

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More Definitions for olefin


ole·​fin | \ˈō-lə-fən \

Medical Definition of olefin 

: alkene

Other Words from olefin

olefinic \ˌō-​lə-​ˈfin-​ik \ adjective

More from Merriam-Webster on olefin

Britannica.com: Encyclopedia article about olefin

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