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butylene
From The Collaborative International Dictionary of English v.0.48:
butene \butene\ n. any of three isomeric singly unsaturated hydrocarbons C4H8; all are used in making synthetic rubbers; -- called also butylene. [WordNet 1.5] .
From The Collaborative International Dictionary of English v.0.48:
Butylene \Bu"ty*lene\, n. [From Butyl.] 1. (Chem.) Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable; -- called also butene. [1913 Webster] 2. the hypothetical divalent radical -(CH2)4-; -- used in combining forms; as, butylene diamine. [PJC]
