noun Chemistry.

  1. any of a series of basic organic compounds, the simplest having the formula C12H11N3, which form bluish and greenish salts, used in the manufacture of dyes.


  1. an organic base used in the production of the dye safranine. Formula: NH 2 C 6 H 4 N:C 6 H 4 :NH
  2. any of a class of organic bases with a similar structure to this compound. Their salts are unstable blue and green dyes
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