umbonal
Americanadjective
-
having the shape or appearance of an umbo; bosslike.
an umbonal structure.
-
of, relating to, or near the umbo.
the umbonal region.
Other Word Forms
- postumbonal adjective
- preumbonal adjective
- subumbonal adjective
Etymology
Origin of umbonal
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
In the Trimerellidae, for example, some of the muscles are attached to a massive or vaulted platform situated in the medio-longitudinal region of the posterior half or umbonal portion of both valves.
From Project Gutenberg
Of the shell 364 or valvular muscles W. King makes out five pairs and an odd one, and individualizes their respective functions as follows:—Three pairs are lateral, having their members limited to the sides of the shell; one pair are transmedians, each member passing across the middle of the reverse side of the shell, while the odd muscle occupies the umbonal cavity.
From Project Gutenberg
Right-hand scutum alone furnished with an internal umbonal tooth: uppermost part of peduncle dark-coloured.
From Project Gutenberg
Valves 5; carina with a truncated and crested base; scuta with strong internal umbonal teeth; terga with the basal point truncated, almost parallel to the occludent margin.
From Project Gutenberg
Valves smooth, thin, brittle; scuta with internal umbonal teeth on both sides.
From Project Gutenberg
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
