adj
Freq #193805
Meanings
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1
adj
containing, resembling, or having the tar-like qualities of bitumen
The workers sealed the roof with a bituminous waterproof coating.
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2
adj
designating a common medium-grade coal rich in carbon and volatile material
The power station was originally designed to burn bituminous coal.
Thesaurus
Etymology
From Late Latin bituminosus, from Latin bitumen ("mineral pitch, asphalt") plus -ous. The word is used for materials that contain or resemble the dark, combustible substance bitumen.