Umbo

[ʌmbәu]

Definition

(noun.) a slight rounded elevation where the malleus attaches to the eardrum.

Edited by Cecilia--From WordNet

Definition

(n.) The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.

(n.) A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvae of echinoderms or in the tympanic membrane of the ear.

(n.) One of the lateral prominence just above the hinge of a bivalve shell.

Edited by Kitty

Definition

n. the boss of a shield: a knob: the point of a bivalve shell immediately above the hinge:—pl. Umbō′nes Um′bos.—adjs. Um′bōnal protuberant; Um′bōnāte -d (bot.) having a central umbo boss or low rounded projection.—n. Umbonā′tion.—adjs. Umbon′ic; Umbon′ulate.

Inputed by Jon