[ oh-luh-fin ]
/ ˈoʊ lə fɪn /

noun Chemistry.

any member of the alkene series.
Also o·le·fine [oh-luh-fin, -feen] /ˈoʊ lə fɪn, -ˌfin/.

Origin of olefin

1855–60; < French oléf(iant) (see olefiant gas) + -in2

Related forms

o·le·fin·ic, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for olefine



/ (ˈəʊlɪˌfiːn, -fɪn, ˈɒl-) /


other names for alkene

Derived Forms

olefinic, adjective

Word Origin for olefine

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

Medicine definitions for olefine


[ ōlə-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.

Science definitions for olefine


[ ōlə-fĭn ]

See alkene.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.