/ Dictionary / Index H hydrochlorothiazide: Meaning and Definition of Find definitions for: hy•dro•chlo•ro•thi•a•zide Pronunciation: (hī"dru-klôr"u-thī'u-zīd", -klōr'-), [key] — n. Pharm. a crystalline, water-insoluble powder, CHClNOS, used as a diuretic and in the treatment of hypertension. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hydrochlorothiazide (Thesaurus) hydrochloride hydrocinnamic acid Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language