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Containing much organic, or at least carbonaceous, matter, mostly in the form of tarry hydrocarbons which are usually described as bitumen.
Similar to bitumen.
Giving off volatile bituminous substances on heating, as in bituminous coal.
Of a mineral, having the odor of bitumen.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.