/ Dictionary / Index H hydroxyzine: Meaning and Definition of Find definitions for: hy•drox•y•zine Pronunciation: (hī-drok'su-zēn"), [key] — n. Pharm. an antihistaminic compound, CHClNO, used in the treatment of allergy, nausea, and anxiety. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hydroxyzine (Thesaurus) hydroxyurea hydrozincite Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language