umbo Meaning, Definition & Usage

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

WordNet

Um"bo noun
Etymology
L.
Wordforms
plural L Umbones E Umbos
Definitions
  1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.
  2. A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvæ of echinoderms or in the tympanic membrane of the ear.
  3. (Zoöl.) One of the lateral prominence just above the hinge of a bivalve shell.

Webster 1913