Meaning of benzidine

ben•zi•dine

Pronunciation: (ben'zi-dēn", -din), [key]
— n. Chem.
  1. a grayish, crystalline, slightly water-soluble, basic compound, CHN, usually derived from nitrobenzene: used chiefly in the synthesis of certain azo dyes, esp. Congo red.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.