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3 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 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.
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From: WordNet (r) 2.0

 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)]

From: WordNet (r) 2.0

 pterygia
      See pterygium