/ Dictionary / Index P pyrosulfuric: Meaning and Definition of Find definitions for: py•ro•sul•fu•ric Pronunciation: (pī"rō-sul-fyoor'ik), [key] — adj. Chem. of or derived from pyrosulfuric acid; disulfuric. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pyrosulfate pyrosulfuric acid Related Content Daily Word Quiz: maritime Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language