Dictionary (n.) A heavy gaseous hydrocarbon, C3H8, of the paraffin series, occurring naturally dissolved in crude petroleum, and also made artificially; -- called also propyl hydride.Thesaurus alcohol benzine briquette burnable butane carbon charcoal coal coke combustible dope ethane ethanol fireball firing flammable flammable material fuel fuel additive fuel dope gas gas carbon gasoline heptane hexane inflammable inflammable material isooctane jet fuel kerosene methane methanol natural gas octane oil paraffin peat pentane propellant rocket fuel turf |