/ Dictionary / Index B beta-naphthylamine: Meaning and Definition of Find definitions for: be•ta-naph•thyl•a•mine Pronunciation: (bā'tu-naf'thu-lu-mēn", -nap'- or, esp. Brit., bē'-), [key] — n. Chem. a white to reddish, crystalline, water-soluble, extremely toxic solid, CHN, used chiefly in the manufacture of azo dyes. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. beta-naphthol beta-naphthyl group Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language