A bituminous coal which softens and becomes pasty or semiviscid when heated. On increasing the heat, the volatile products are driven off, and a coherent, grayish-black, cellular mass of coke is left.

A pair of buttons or studs joined by a link, to hold together the lapels of a double-breasted coat; or a button with a loop for a single-breasted coat.

(nautical) A canvas cover laced over furled sails etc. to keep them dry and clean.

(nautical) A piece of canvas nailed around a mast, where it passes through the deck, to prevent water from getting below.

(mining) mineral coal

coal coming from the ground, as opposed to charcoal / Silky fibrous layers of charcoal, interlaminated in beds of ordinary bituminous coal.

Anthracite, as distinguished from bituminous soft coal.

(American football) An offense that places a greater emphasis on passing than on running.

the type of coal used in coal-fired electrical power plants

The type of coal used for the making of steel.