The Collaborative International Dictionary of English v.0.48:

Rosolic \Ro*sol"ic\, a. [Rose + carbolic.] (Chem.)
   Pertaining to, or designating, a complex red dyestuff (called
   rosolic acid) which is analogous to rosaniline and aurin. It
   is produced by oxidizing a mixture of phenol and cresol, as a
   dark red amorphous mass, C20H16O3, which forms weak salts
   with bases, and stable ones with acids. Called also methyl
   aurin, and, formerly, corallin.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Corallin \Cor"al*lin\, n. [So named in allusion to the color of
   red corallin, fr. L. corallum coral.] (Chem.)
   A yellow coal-tar dyestuff which probably consists chiefly of
   rosolic acid. See Aurin, and Rosolic acid under
   Rosolic.
   [1913 Webster]

   Red corallin, a red dyestuff which is obtained by treating
      aurin or rosolic acid with ammonia; -- called also
      p[ae]onin.

   Yellow corallin. See Aurin.
      [1913 Webster]