Coal tar
WordNet
noun
(1) A tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds
WiktionaryText
Noun
- A black, viscous tar made by the destructive distillation of coal (to make coke and town gas); it contains a great number of compounds including hydrocarbons and phenols; used in the preparation of medicated soap and shampoo, and industrially for the manufacture of very many products