n. (Chem.) One of a group of metameric hydrocarbons, C5H10, of the ethylene series. The colorless, volatile, mobile liquid commonly called amylene is a mixture of different members of the group. [ 1913 Webster ]

n. [ Pref. di- + amylene. ] (Chem.) A liquid hydrocarbon, C10H20, of the ethylene series, regarded as a polymeric form of amylene. [ 1913 Webster ]