con·cha /ˈkɑŋkə/
  耳殼;外耳
  con·cha /ˈkɑŋkə , ˈkɔŋ-/ 名詞
  (複conchae)甲,介殼,貝殼
  Con·cha n.
  1. Arch. The plain semidome of an apse; sometimes used for the entire apse.
  2. Anat. The external ear; esp. the largest and deepest concavity of the external ear, surrounding the entrance to the auditory canal.
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  concha
       n : (anatomy) a structure that resembles a shell in shape
       [also: conchae (pl)]