Source : Webster's Revised Unabridged Dictionary (1913)

Safranin \Saf"ra*nin\, n. (Chem.)
   (a) An orange-red dyestuff extracted from the saffron. [R.]
   (b) A red dyestuff extracted from the safflower, and formerly
       used in dyeing wool, silk, and cotton pink and scarlet;
       -- called also {Spanish red}, {China lake}, and
       {carthamin}.
   (c) An orange-red dyestuff prepared from certain nitro
       compounds of creosol, and used as a substitute for the
       safflower dye.

Source : WordNet®

safranin
     n : any of a class of chiefly red organic dyes [syn: {safranine},
          {saffranine}]