either of two alkanes (normal butane and isobutane) having the same formula, CH, but different structures and used esp. as a fuel
Origin of butanebut(yl) + -ane
Either of two isomers of a gaseous hydrocarbon, C4H10, produced synthetically from petroleum and used as a household fuel, refrigerant, and aerosol propellant and in the manufacture of synthetic rubber.
Origin of butanebut(yl) -ane
(countable and uncountable, plural butanes)