(1):
(n.) An iron shoe at the end of the stock of a gun carriage.
(2):
(n.) A kind of watch crystal which is more than ordinarily flattened in the center; also, a species of convexoconcave lens for spectacles.
(3):
(n.) A half horseshoe, which wants the sponge.
(4):
(n.) Any surface of semicircular or segmental form; especially, the piece of wall between the curves of a vault and its springing line.
(5):
(n.) A fieldwork consisting of two faces, forming a salient angle, and two parallel flanks. See Bastion.
(6):
(n.) A piece of felt to cover the eye of a vicious horse.