Source : Webster's Revised Unabridged Dictionary (1913)

Purpurogenous \Pur`pu*rog"e*nous\, a. [L. purpura purple +
   -genous.] (Biol.)
   Having the power to produce a purple color; as, the
   purpurogenous membrane, or choroidal epithelium, of the eye.
   See {Visual purple}, under {Visual}.