fo·vea /ˈfoviə/
  小窩,凹
  fo·vea /ˈfovɪə/ 名詞
  凹
  Fo·ve·a n.; pl. Foveæ   A slight depression or pit; a fossa.
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  fovea
       n : area consisting of a small depression in the retina
           containing cones and where vision is most acute [syn: fovea
           centralis]
       [also: foveae (pl)]