/ Dictionary / Index T toluidine: Meaning and Definition of Find definitions for: to•lu•i•dine Pronunciation: (tu-l'i-dēn", -din), [key] — n. Chem. any of three isomeric amines having the formula CHN, derived from toluene: used in the dye and drug industries. Cf. metatoluidine, orthotoluidine, paratoluidine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. toluic acid toluol Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language