/ Dictionary / Index H hydriodic: Meaning and Definition of Find definitions for: hy•dri•od•ic Pronunciation: (hī"drē-od'ik), [key] — adj. of or derived from hydriodic acid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrilla hydriodic acid 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