/ Dictionary / Index T thiazide: Meaning and Definition of Find definitions for: thi•a•zide Pronunciation: (thī'u-zīd", -zid), [key] — n. Pharm. a member of a class of diuretic substances that inhibit the reabsorption of sodium chloride in the distal convoluted tubule of the kidneys: used principally to treat hypertension. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thiazide (Thesaurus) thiamine mononitrate thiazine Related Content Daily Word Quiz: frugal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language