Do you really want to send Webster 1913 a message saying you like their work?
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.
© Webster 1913.