any unsaturated aliphatic hydrocarbon with the general formula CnH2n
b. Also called: olefine
(as modifier)
alkene series
alkene in American English
(ˈælˌkin)
noun
any of a series of unsaturated open-chain hydrocarbons containing a double bond and having the general formula CnH2n: these compounds are sometimes said to be in the ethylene or olefin series