the transparent tissue over the front of the eyeball, covering the iris and pupil
Webster’s New World College Dictionary, Fourth Edition, compiled by the
editors of Webster’s New World Dictionaries. Copyright © 2010 by Houghton
Mifflin Harcourt. Published by Houghton Mifflin Harcourt. All rights reserved.
Word origin of 'cornea'
ME < ML < L cornea (tela),
horny (web, tissue), fem. sing. of corneus
< cornu, horn