(a) a ball made of coal dust, for use as fuel (now rare); (b) Geology a rounded mass of calcite or pyrite containing fossilized plant remains…

(a) powdered coal or coal dust formed into tubular briquettes; (b) coal occurring in seams a few inches thick.

A ball of clay and coal, used as fuel. Obsolete. rare.

= hotshot, n. 2.

A compact ball of combustible material for use in kindling fires; a ball-shaped firelighter. Obsolete.

A small block of compressed coal dust or other combustible material used as fuel; esp. a typically pillow-shaped block of compressed fuel for…

A block of compressed coal-dust, usually with addition of a binding substance such as pitch.

= slurry, n. 1b.

spec. A mixture of water and fine particles of coal, produced esp. as a by-product of the washing of coal; such material in dried form, used as fuel.

a smokeless fuel that leaves little ash, made from coal by carbonization at a low temperature (usually 500–600°C).

A kind of smokeless fuel made by carbonizing briquettes at relatively low temperatures.

a synthetic product made from coal in imitation of crude oil; also as adj.