the vb.-stem or noun of action in Comb. Knock-bark (Mining), ore that has been crushed; knock-stone, a stone (or cast-iron plate) on which ore is broken. Also with adverbs, as knock-on (Football), an act of ‘knocking on’ (see KNOCK v. 11); knock-under, an act of ‘knocking under’ (see KNOCK v. 15). See also KNOCK-ABOUT, KNOCK-DOWN, KNOCK-KNEE, etc.
1653. Manlove, Lead Mines, 266. Fell, Bous, and *Knock-barke.
1747. [see knock-stone].
1828. Craven Dial., Knock-bark, ore after it is reduced by the hand or machine.
1888. Daily News, 5 Oct., 5/2. A *knock-on gives a free kick.
1747. Hooson, Miner’s Dict., L j. Knockbark [is] all that is carried to the *Knock-Stone and there knocked down with the Bucker.
1839. Ure, Dict. Arts, 749. A very hard stone slab, or cast-iron plate,… called a knock-stone.
1894. Blackmore, Perlycross, 51. They seem to have brought him down to a flat *knock-under.
