/ Dictionary / Index H hydroxyketone: Meaning and Definition of Find definitions for: hy•drox•y•ke•tone Pronunciation: (hī-drok"si-kē'tōn), [key] — n. a ketone containing a hydroxyl group. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydroxychloroquine hydroxyl Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language