pterygium
  翼狀□肉
  pte·ryg·i·um /tɛˈrɪʤɪəm/ 名詞
  翼狀肉肉,鰭(型肢),翅,翅後基葉,喙側葉
  Pte·ryg·i·um n.; pl. E. Pterygiums L. Pterygia   Med. A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.
  ◄ ►
  pterygium
       n : a thickened triangular layer of conjunctiva extending from
           the nasal edge of the eye to the cornea; pterygia arise
           from irritation of the pinguecula
       [also: pterygia (pl)]