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umbo n. 盾心,殼嘴,鼓膜凸 盾心,殼嘴,鼓膜凸 umbo n 1: a slight rounded elevation where the malleus attaches to the eardrum Umbo \Um"bo\, n.; pl. L. {Umbones}, E. {Umbos}. [L.]
1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike. [1913 Webster] 2. 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. [1913 Webster] 3. (Zool.) One of the lateral prominences just above the hinge of a bivalve shell. [1913 Webster] Umbonate |
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