[ uhm-buh-nl ]
/ ˈʌm bə nl /
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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for umbonal
Ligament wanting; shell gaping, with a styloid apophysis in the umbonal cavities.
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