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olefin Line breaks: ole¦fin
Pronunciation: /ˈəʊlɪfɪn/
(also olefine)

Definition of olefin in English:


Another term for alkene.
Example sentences
  • Epoxidation, the conversion of an olefin (an unsaturated alkene hydrocarbon) to a cyclic ether through reaction with hydrogen peroxide, a peracid, or oxygen, is an important chemical technique.
  • Whatever the feedstock, the product slate is a complex mixture of hydrogen, ethylene, other olefins, diolefins and gasoline as well as smaller amounts of acetylenes and carbon monoxide.
  • The second phase comprises an organic solvent containing soluble reagents such as olefins.


Pronunciation: /ˌəʊlɪˈfɪnɪk/
Example sentences
  • Structurally, morphine exhibits the complexity and multifunctionality typical of so many alkaloids; its benzylisoquinoline nucleus supports amino, hydroxyl, olefinic and ether functions in a pentacyclic system.
  • Essential oil hydrocarbons are usually olefinic and made up of isoprene units: terpenes, sesquiterpenes and diterpenes.
  • Process for selectively separating hydrogen, or both hydrogen and carbon monoxide from olefinic hydrocarbons


Mid 19th century: from French oléfiant 'oil-forming' (with reference to oily ethylene dichloride).

Definition of olefin in:
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