鏈烯烴
Olefine \O"le*fine\, n. [From {Olefiant}.] (Chem.) Olefiant gas, or ethylene; hence, by extension, any one of the series of unsaturated hydrocarbons of which ethylene is a type. See {Ethylene}.
olefine n : any unsaturated aliphatic hydrocarbon [syn: {alkene}, {olefin}]