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Meaning of thiophosphoric acid

thi•o•phos•phor•ic ac'id

Pronunciation: (thī"ō-fos-fôr'ik, -for'-), [key]
— Chem. Chem.
  1. 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.