Found 2 items, similar to Pterygium.
English → English (WordNet) Definition: pterygium 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)]
English → English (gcide) Definition: Pterygium Pterygium \Pte*ryg"i*um\, n.; pl. E. Pterygiums, L. Pterygia. [NL., fr. Gr. ?, properly a dim, akin to ? a feather.] (Med.) A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye. [1913 Webster]