/ Dictionary / Index H hydroxynaphthalene: Meaning and Definition of Find definitions for: hy•drox•y•naph•tha•lene Pronunciation: (hī-drok"si-naf'thu-lēn", -nap'-), [key] — n. naphthol. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hydroxyl ion hydroxyproline Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language