Source : Webster's Revised Unabridged Dictionary (1913)

Erythrin \E*ryth"rin\, Erythrine \E*ryth"rine\, n. [Gr.
   'eryqro`s red.]
   1. (Chem.) A colorless crystalline substance, {C20H22O10},
      extracted from certain lichens, as the various species of
      {Rocella}. It is a derivative of orsellinic acid. So
      called because of certain red compounds derived from it.
      Called also {erythric} acid.

   2. (Min.) See {Erythrite}, 2.