Bituminous

Part of speech: adjective (a.)

Having the qualities of bitumen; compounded with bitumen; containing bitumen. Near that bituminous lake where Sodom flamed. Milton. Bituminous coal, a kind of coal which yields, when heated, a considerable amount of volatile bituminous matter. It burns with a yellow smoky flame. -- Bituminous limestone, a mineral of a brown or black color, emitting an unpleasant smell when rubbed. That of Dalmatia is so charged with bitumen that it may be cut like soap. -- Bituminous shale, an argillaceous shale impregnated with bitumen, often accompanying coal.