Mineral coal, as opposed to charcoal / Any hard coal. / Anthracite.

plural of coal hole

plural of coal cracker

Containing or yielding coal

(geology) The measure or degree of the progressive coalification (organic metamorphism) of a coal, often expressed in terms of vitrinite reflectance.

plural of coal rank

Bituminous coal which is suitable for making into coke, for example for use in steel manufacture.

Having been enveloped in a cloud of soot from the exhaust of a coal roller, who rolled coal, who engaged in coal-rolling.

(automotive) One that rolls coal; one that produces copious amounts of partially burnt fuel as black smoke in automotive exhaust on purpose.

The activity of the verb to roll coal.