Heptene \Hep"tene\, n. [Gr. "epta` seven.] (Chem.) Same as {Heptylene}. [1913 Webster]
Heptylene \Hep"tyl*ene\, n. (Chem.) A colorless liquid hydrocarbon, {C7H14}, of the ethylene series; also, any one of its isomers. Called also {heptene}. [1913 Webster]