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4 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 um·bo /ˈʌm(ˌ)bo/
 盾心,殼嘴,鼓膜凸

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 um·bo /ˈəm(ˌ)bo/ 名詞
 鱗臍,突起

From: Webster's Revised Unabridged Dictionary (1913)

 Um·bo n.; pl. L. Umbones E. Umbos
 1. The boss of a shield, at or near the middle, and usually projecting, sometimes in a sharp spike.
 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.
 3. Zool. One of the lateral prominences just above the hinge of a bivalve shell.
 ◄ ►

From: WordNet (r) 2.0

 umbo
      n : a slight rounded elevation where the malleus attaches to the
          eardrum
      [also: umbones (pl)]