umbo
noun
a boss on a shield, as one at the center of a circular shield.
umbones
-
pluralof umbo.plural
The grammatical form denoting more than one person, place, thing, or idea.
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.
Shell longitudinal, wedge-shaped, equivalve, the valves gaping; the umbones straight, pointed.
From Zoological Illustrations, Volume III or Original Figures and Descriptions of New, Rare, or Interesting Animals by William Swainson
The valves are plainly marked by the zones of successive growth; and most of them are ribbed and furrowed slightly, from their umbones to their basal margins.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
Valves 2 to 5, minute, remote from each other: scuta with two or three lobes, with their umbones in the middle of the occludent margin: carina arched, upper and lower ends nearly alike.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
Valves 5, approximate: carina extending up between the terga, terminating downwards in an embedded fork, or in an external disc: scuta sub-triangular, with their umbones at the rostral angle.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
In all four valves of Ibla, the umbones, or centres of growth, are at their upper points.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
