/ Dictionary / Index T thiosulfuric: Meaning and Definition of Find definitions for: thi•o•sul•fu•ric Pronunciation: (thī"ō-sul-fyoor'ik), [key] — adj. Chem. of or derived from thiosulfuric acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. thiosulfate thiosulfuric acid 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