/ Dictionary / Index H hydrazone: Meaning and Definition of Find definitions for: hy•dra•zone Pronunciation: (hī'dru-zōn"), [key] — n. any of a class of compounds containing the group &whence;C=NNH. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydrazoic acid hydremia 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