umbo

noun
um·​bo | \ ˈəm-(ˌ)bō How to pronounce umbo (audio) \
plural umbones\ ˌəm-​ˈbō-​(ˌ)nēz How to pronounce umbo (audio) \ 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 How to pronounce umbo (audio) , ˌəm-​ˈbō-​ How to pronounce umbo (audio) \ adjective
umbonate \ ˈəm-​bə-​ˌnāt How to pronounce umbo (audio) , ˌəm-​ˈbō-​nət How to pronounce umbo (audio) \ 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

umbles

umbo

umbolateral

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Cite this Entry

“Umbo.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/umbo. Accessed 4 Dec. 2021.

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More Definitions for umbo

umbo

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

Medical Definition of umbo

: an elevation in the tympanic membrane of the ear

More from Merriam-Webster on umbo

Britannica.com: Encyclopedia article about umbo

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