/ Dictionary / Index X x-disease: Meaning and Definition of Find definitions for: x-dis•ease Pronunciation: (eks'di-zēz"), [key] — n. Vet. Pathol. hyperkeratosis (def. 2). See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xd Xe Related Content Daily Word Quiz: diaphanous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language