/ Dictionary / Index K keratinize: Meaning and Definition of Find definitions for: ker•a•tin•ize Pronunciation: (ker'u-tn-īz"), [key] — -ized, -iz•ing. to make or become keratinous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: keratinize (Thesaurus) keratin keratinous Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language