bituminous

[ bahy-too-muh-nuh s, -tyoo-, bi- ]

/ baɪˈtu mə nəs, -ˈtyu-, bɪ- /

resembling or containing bitumen: bituminous shale.

Origin of bituminous

1610–20; < Latin bitūminōsus, equivalent to bitūmin- (stem of bitūmen) bitumen + -ōsus -ous

non·bi·tu·mi·nous, adjective

Five feet of wood or plant may produce about one foot of bituminous coal, or six-tenths of a foot of anthracite.

The Economic Aspect of Geology |C. K. Leith
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.

The Economic Aspect of Geology |C. K. Leith
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.

The Atlantic Monthly, Volume 15, No. 90, April, 1865 |Various