01 n. Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable; -- called also butene.
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1.
Any one of three metameric hydrocarbons, C4H8, of the ethylene series. They are gaseous or easily liquefiable; -- called also butene.(Chem.) Also: butene
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2.
the hypothetical divalent radical -(CH2)4-; -- used in combining forms; as, butylene diamine.