toluene n 1: a colorless flammable liquid obtained from petroleum or coal tar; used as a solvent for gums and lacquers and in high-octane fuels [syn: {toluene}, {methylbenzene}]
Toluene \Tol"u*ene\, n. [Tolu + benzene.] (Chem.) A hydrocarbon, {C6H5.CH3}, of the aromatic series, homologous with benzene, and obtained as a light mobile colorless liquid, by distilling tolu balsam, coal tar, etc.; -- called also {methyl benzene}, {phenyl methane}, etc. [1913 Webster]