pterygium Meaning, Definition & Usage

  1. noun either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pinguecula

WordNet

Pte*ryg"i*um noun
Etymology
NL., fr. Gr. , properly a dim, akin to a feather.
Wordforms
plural E Pterygiums L Pterygia
Definitions
  1. (Med.) A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.

Webster 1913