/ Dictionary / Index T thioridazine: Meaning and Definition of Find definitions for: thi•o•rid•a•zine Pronunciation: (thī"u-rid'u-zēn", -zin), [key] — n. Pharm. a phenothiazine, CHNS, used as an antipsychotic chiefly in the treatment of acute psychoses and schizophrenia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: thioridazine (Thesaurus) thiophosphoric acid thio salt 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