What does "safranin" mean?

Safranin: (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.