umbo

noun
um·​bo | \ˈəm-(ˌ)bō \
plural umbones\ˌəm-​ˈbō-​(ˌ)nēz \ or umbos

Definition of umbo 

1 : the boss of a shield

2 : a rounded elevation: such 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

Illustration of umbo

Illustration of umbo

U umbo 1

Other Words from umbo

umbonal \ˈəm-​bə-​nᵊl, ˌəm-​ˈbō-​ \ adjective
umbonate \ˈəm-​bə-​ˌnāt, ˌəm-​ˈbō-​nət \ adjective

First Known Use of umbo

1721, in the meaning defined at sense 1

History and Etymology for umbo

Latin; akin to Latin umbilicus — more at navel

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Dictionary Entries near umbo

umbilroot

umble pie

umbles

umbo

umbolateral

umbone

umbonic

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Time Traveler for umbo

The first known use of umbo was in 1721

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More Definitions for umbo

umbo

noun
um·​bo | \ˈəm-(ˌ)bō \
plural umbones\ˌəm-​ˈbō-​(ˌ)nēz \ or umbos

Medical Definition of umbo 

: an elevation in the tympanic membrane of the ear

More from Merriam-Webster on umbo

Rhyming Dictionary: Words that rhyme with umbo

Britannica.com: Encyclopedia article about umbo

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