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.
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
The umbones of these two latera are seated at their basal outer angles, so that the growth of the valves is towards each other and upwards.
From A Monograph on the Sub-class Cirripedia With Figures of all the Species. by Charles Darwin
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
The young Brachiopod in all its species is protected by an embryonic shell called the “protegulum,” which sometimes persists in the umbones of the adult shells but is more usually worn off.
From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" by Various
