Etymology
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toluene (n.)

colorless liquid hydrocarbon, 1855, from German toluin (Berzelius, 1842), from Tolu, place in Colombia (now Santiago de Tolu) from which "balsam of Tolu" was obtained from the bark of certain trees, which were known in Europe by the name of the port. The chemical so called because it was first distilled (1841) from balsam of Tolu. The place name is of unknown origin.

updated on February 11, 2014

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Definitions of toluene from WordNet

toluene (n.)
a colorless flammable liquid obtained from petroleum or coal tar; used as a solvent for gums and lacquers and in high-octane fuels;
Synonyms: methylbenzene
From wordnet.princeton.edu, not affiliated with etymonline.