noun Chemistry.

any member of the alkene series.

Nearby words

  1. oleaster,
  2. oleate,
  3. olecranon,
  4. oled,
  5. olefiant gas,
  6. olefin fiber,
  7. olefin series,
  8. olefine,
  9. oleg,
  10. oleic

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 formso·le·fin·ic, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Medicine definitions for olefin




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 olefin



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