olefin

Noun

o=le=fin

CIDE DICTIONARY

olefin, n. [From Olefiant.].

Olefiant gas, or ethylene. See Ethylene. [1913 Webster]
Any one of the series of unsaturated hydrocarbons of which ethylene is the type; a member of the alkene series of hydrocarbons; an alkene. [1913 Webster]

olefin, n. (also olefine) Chem. = ALKENE.

Etymology

F ol{eacute}fiant oil-forming (with ref. to oily ethylene dichloride)

For further exploring for "olefin" in Webster Dictionary Online

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