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[oh-luh-fin] /ˈoʊ lə fɪn/
noun, Chemistry
any member of the alkene series.
Also, olefine
[oh-luh-fin, -feen] /ˈoʊ lə fɪn, -ˌfin/ (Show IPA)
Origin of olefin
1855-60; < French oléf(iant) (see olefiant gas) + -in2
Related forms
olefinic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for olefin
  • Polypropylene, commonly called olefin, a very common pile yarn, as is nylon.
British Dictionary definitions for olefin


/ˈəʊlɪˌfiːn; -fɪn; ˈɒl-/
other names for alkene
Derived Forms
olefinic, adjective
Word Origin
C19: from French oléfiant, ultimately from Latin oleum oil + facere to make
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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olefin in Medicine

olefin o·le·fin (ō'lə-fĭn)
Any of a group of unsaturated open chain hydrocarbons possessing one or more double bonds, the simplest of which is ethylene.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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olefin in Science
See alkene.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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