umbonal

[ uhm-buh-nl ]

adjective

1. having the shape or appearance of an umbo; bosslike:

   an umbonal structure.

2. of, relating to, or near the umbo:

   the umbonal region.

Other Words From

• post·umbo·nal adjective
• pre·umbo·nal adjective
• sub·umbo·nal adjective

Word History and Origins

Origin of umbonal¹

1850–55; < Latin umbōn- (stem of umbō; umbo ) + -al ¹

Example Sentences

Valves smooth, thin, brittle; scuta with internal umbonal teeth on both sides.

From Project Gutenberg

Right-hand scutum alone furnished with an internal umbonal tooth: uppermost part of peduncle dark-coloured.

From Project Gutenberg

Its shell is considerably twisted just below the umbonal region, while its whole surface is densely striated.

From Project Gutenberg

Ligament wanting; shell gaping, with a styloid apophysis in the umbonal cavities.

From Project Gutenberg