Webster's Revised Unabridged Dictionary · 1913

Toluene

Toluene , noun

[Tolu + benzene.]

(Chemistry) 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.