/ Dictionary / Index K keratoconus: Meaning and Definition of Find definitions for: ker•a•to•co•nus Pronunciation: (ker"u-tō-kō'nus), [key] — pl. -ni a degenerative condition characterized by conical protrusion of the cornea and irregular astigmatism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: keratoconus (Thesaurus) keratoconjunctivitis keratode Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language