butene

from WordNet (r) 3.0 (2006)

butene
    n 1: any of three isomeric hydrocarbons C4H8; all used in making
         synthetic rubbers [syn: {butylene}, {butene}]

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]

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