umbonal

[uhm-buh-nl]

adjective

having the shape or appearance of an umbo; bosslike: an umbonal structure.
of, relating to, or near the umbo: the umbonal region.

Also um·bon·ic

[uhm-bon-ik] /ʌmˈbɒn ɪk/.

Origin of umbonal

1850–55; < Latin umbōn- (stem of umbō; see umbo) + -al¹

Related formspost·um·bo·nal, adjectivepre·um·bo·nal, adjectivesub·um·bo·nal, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for umbonal

Historical Examples of umbonal

Its shell is considerably twisted just below the umbonal region, while its whole surface is densely striated.
The Sea-beach at Ebb-tide
Augusta Foote Arnold
Ligament wanting; shell gaping, with a styloid apophysis in the umbonal cavities.
Encyclopaedia Britannica, 11th Edition, Volume 16, Slice 1
Various