/ Dictionary / Index T thiophosphoric acid: Meaning and Definition of Find definitions for: thi•o•phos•phor•ic ac'id Pronunciation: (thī"ō-fos-fôr'ik, -for'-), [key] — Chem. Chem. an acid derived from phosphoric acid by substituting one or more sulfur atoms for oxygen atoms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thiophosphate thioridazine 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