Quoin, n.

(kwŏin, or koin) (Synop., § 130), n. [See COIN.]

1Sense 1. Any external angle; especially (Arch.), the external angle of a building; sometimes, formerly, vertical angular projections formed on the face of a wall for ornament. Oxf. Gloss.

2Sense 2. A wedge-like piece of stone, wood, metal, or other material, used for various purposes; as, (a.) (Masonry.) To support and steady a stone, (b.) (Gun.) To raise a cannon to a proper level, (c.) (Print.) To wedge the pages up within a chase. Savage.