Dust of coal; the finer particles that are separated by screening.
1597. Hooker, Eccl. Pol., V. lxv. (1617), 350. It were but to draw men out of Lime into Cole-dust.
1799. G. Smith, Labor., I. 21. Filled with a composition of coarse coal-dust.
1862. Ansted, Hungary & Trans., 194 (L.). It has been attempted … to make the coal-dust into bricks.
