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

Illustration of UMBO

Origin of UMBO

Latin; akin to Latin umbilicus — more at navel
First Known Use: 1721

Rhymes with UMBO


noun um·bo \ˈəm-(ˌ)bō\   (Medical Dictionary)
plural um·bo·nes \ˌəm-ˈbō-(ˌ)nēz\ or umbos

Medical Definition of UMBO

:  an elevation in the tympanic membrane of the ear


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May 30, 2015
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