QUOIN

I. noun Etymology: alteration of 1coin Date: 1532 1. a solid exterior angle (as of a building), one of the members (as a block) forming a ~ and usually differentiated from the adjoining walls by material, texture, color, size, or projection, the keystone or a voussoir of an arch, a wooden or expandable metal block used by printers to lock up a form within a chase, II. transitive verb Date: 1683 to equip (a type form) with ~s, to provide with ~s