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: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0 1 2 3 4 5 6 7 8 9
[2x]
: U- U. U3 Ua Ub Uc Ud Uf Ug Uh Ui Uk Ul Um Un Up Ur Us Ut Uu Uv Uw Ux Uy Uz
umbilicated | umbilication | umbilicus | umble pie | umbles | umbo | umbonate | umbonated | umbra | umbraculiferous | umbraculiform

umbo

CIDE DICTIONARY

umbon. [L.].
  •  The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.  [1913 Webster]
  •  A boss, or rounded elevation, or a corresponding depression, in a palate, disk, or membrane; as, the umbo in the integument of the larvæ of echinoderms or in the tympanic membrane of the ear.  [1913 Webster]
  •  One of the lateral prominences just above the hinge of a bivalve shell.  [1913 Webster]

OXFORD DICTIONARY

umbo, n. (pl. -os or umbones)
1 the boss of a shield, esp. in the centre.
2 Bot. & Zool. a rounded knob or protuberance.

Derivative
umbonal adj. umbonate adj.
Etymology
L umbo -onis

For further exploring for "umbo" in Webster Dictionary Online


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