Pterygium

·noun A superficial growth of vascular tissue radiating in a fanlike manner from the cornea over the surface of the eye.

pterygium
ptĕrygĭum, ĭi, n., = πτερύγιον. I A film that grows over the eye , a pearl , web , or haw , Cels...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.