'Umbo' definitions:
Definition of 'umbo'
From: WordNet
noun
A slight rounded elevation where the malleus attaches to the eardrum
Definition of 'Umbo'
From: GCIDE
- Umbo \Um"bo\, n.; pl. L. Umbones, E. Umbos. [L.]
- 1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. [1913 Webster]
- 2. 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. [1913 Webster]
- 3. (Zool.) One of the lateral prominences just above the hinge of a bivalve shell. [1913 Webster] Umbonate