umbo

um·bo

noun \ˈəm-(ˌ)bō\

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

Definition of UMBO

1

: the boss of a shield

2

: 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

Illustration of UMBO

Origin of UMBO

Latin; akin to Latin umbilicus — more at navel

First Known Use: 1721

Rhymes with UMBO

gumbo, jumbo