Dictionary

umbo

noun um·bo \ˈəm-(ˌ)bō\

plural um·bo·nes \ˌəm-ˈbō-(ˌ)nēz\ or umbos

Definition of UMBO

: the boss of a shield

: a rounded elevation: as

a : an inward projection of the tympanic membrane of the ear

b : one of the lateral prominences just above the hinge of a bivalve shell

— um·bo·nal \ˈəm-bə-n^əl, ˌəm-ˈbō-\ adjective

— um·bo·nate \ˈəm-bə-ˌnāt, ˌəm-ˈbō-nət\ adjective

Latin; akin to Latin umbilicus — more at navel

First Known Use: 1721

Medical Dictionary

noun um·bo \ˈəm-(ˌ)bō\

plural um·bo·nes \ˌəm-ˈbō-(ˌ)nēz\ or umbos

: an elevation in the tympanic membrane of the ear

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