DictionaryRoot: bitumen
Latin
bitumen
asphalt, mineral pitch
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adjective
bituminous
bih-TOO-muh-nus/bɪˈtuːmɪnəs/
Containing, resembling, or relating to bitumen.
Etymology
The adjective ending turns bitumen, “mineral pitch,” into a description of things having its nature. Bituminous therefore covers resemblance to asphalt as well as the presence of the substance itself.