Olefine
Pronunciation : O"le*fine
Part of Speech : n.
Etymology : [From Olefiant.] (Chem.)
Definition : Defn: Olefiant gas, or ethylene; hence, by extension, any one of the series of unsaturated hydrocarbons of which ethylene is a type. See Ethylene.
Source : Webster's Unabridged Dictionary, 1913