/ Dictionary / Index H hydriodic acid: Meaning and Definition of Find definitions for: hy'driod'ic ac'id Pronunciation: [key] a colorless corrosive liquid, HI, an aqueous solution of hydrogen iodide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydriodic hydro Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language