/ Dictionary / Index A alpha-naphthol: Meaning and Definition of Find definitions for: al•pha-naph•thol Pronunciation: (al"fu-naf'thôl, -thol, -nap'-), [key] — n. Chem. See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: alpha-naphthol (Thesaurus) alpha-ketoglutaric acid alpha-naphthyl group Related Content Daily Word Quiz: lyre Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language