Origin of bituminous
Related formsnon·bi·tu·mi·nous, adjective
Examples from the Web for bituminous
Five feet of wood or plant may produce about one foot of bituminous coal, or six-tenths of a foot of anthracite.
The four counties adjoining Pittsburg turn out over thirty millions of tons of bituminous coal in a year.America, Volume II (of 6)|Joel Cook
Bituminous may be distinguished from subbituminous by the manner of weathering.
We have anthracite coal for but fifty years, and bituminous coal for less than two hundred.The Fight For Conservation|Gifford Pinchot
This coal is of an inferior quality, bituminous, and largely mixed with slate.