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Definitions for Umbo

[1] a boss on a shield, as one at the center of a circular shield.
[2] any similar boss or protuberance.
[3] Zoology . the beak of a bivalve shell; the protuberance of each valve above the hinge.
[4] Anatomy . the depressed area on the outer surface of the tympanic membrane.
[5] a blunt or rounded protuberance arising from a surface, as on a pine cone scale.
[6] a small hump projecting from the centre of the cap in certain mushrooms
[7] a hooked prominence occurring at the apex of each half of the shell of a bivalve mollusc
[8] anatomy the slightly convex area at the centre of the outer surface of the eardrum, where the malleus is attached on the internal surface
[9] a large projecting central boss on a shield, esp on a Saxon shield

Words nearby Umbo

umbilication, umbilicus, umbiliform, umble pie, umbles, umbo, umbonal, umbonate, umbra, umbrage, umbrageous

Origin of Umbo

1715–25; < Latin umbō boss (of a shield), knob, projecting part; akin to umbilīcus (see umbilicus)

Other words from Umbo

um′ bo•nal (ŭm′ bə-nəl, ŭm-bō′ nəl ) null adj.

Word origin for Umbo

C18: from Latin: boss of a shield, projecting piece