Cornice \Cor"nice\ (k?r"n?s), n. [F. corniche, It. cornice, LL. coronix, cornix, fr. L. coronis a curved line, a flourish with the pen at the end of a book or chapter, Gr. ???; akin to L. corona crown. sEE Crown, and cf. Coronis.]

(Arch.) Any horizontal, molded or otherwise decorated projection which crowns or finishes the part to which it is affixed; as, the cornice of an order, pedestal, door, window, or house. --Gwilt.

Cornice ring, the ring on a cannon next behind the muzzle ring.

Source: Webster's Revised Unabridged Dictionary (1913)