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pl.
of Umbo
n.
The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.
n.
A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvae of echinoderms or in the tympanic membrane of the ear.
n.
One of the lateral prominence just above the hinge of a bivalve shell.
a.
Alt. of Umbonated
a.
Having a conical or rounded projection or protuberance, like a boss.
pl.
of Umbra
n.
The conical shadow projected from a planet or satellite, on the side opposite to the sun, within which a spectator could see no portion of the sun's disk; -- used in contradistinction from penumbra. See Penumbra.
n.
The central dark portion, or nucleus, of a sun spot.
n.
The fainter part of a sun spot; -- now more commonly called penumbra.
n.
Any one of several species of sciaenoid food fishes of the genus Umbrina, especially the Mediterranean species (U. cirrhosa), which is highly esteemed as a market fish; -- called also ombre, and umbrine.
a.
Bearing something like an open umbrella.
a.
Having the form of anything that serves to shade, as a tree top, an umbrella, and the like; specifically (Bot.), having the form of an umbrella; umbrella-shaped.
n.
Shade; shadow; obscurity; hence, that which affords a shade, as a screen of trees or foliage.
n.
Shadowy resemblance; shadow.
n.
The feeling of being overshadowed; jealousy of another, as standing in one's light or way; hence, suspicion of injury or wrong; offense; resentment.
a.
Forming or affording a shade; shady; shaded; as, umbrageous trees or foliage.
a.
Not easily perceived, as if from being darkened or shaded; obscure.
a.
Feeling jealousy or umbrage; taking, or disposed to take, umbrage; suspicious.
v. t.
To shade; to shadow; to foreshadow.

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