Chrysophanic /(?)/

Chrys·o·phan·ic

Chrysophanic

a.
  1. Pertaining to, or derived from, or resembling, chrysophane.

Phrases & Compounds
Chrysophanic acid
a yellow crystalline substance extracted from rhubarb, yellow dock, sienna, chrysarobin, etc., and shown to be a derivative of an anthracene. It is used in the treatment of skin diseases; -- called also rhein, rheic acid, rhubarbarin, etc.