/ Dictionary / Index P permonosulfuric acid: Meaning and Definition of Find definitions for: per•mon'o•sul•fu'ric ac'id Pronunciation: (pur-mon'ō-sul-fyoor'ik), [key] — Chem. Chem. See(def. 1). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. permittivity permutate 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