The Collaborative International Dictionary
Chrysophane
Chrysophane \Chrys"o*phane\, n. [Gr. chryso`s gold + ? to show.] (Chem.) A glucoside extracted from rhubarb as a bitter, yellow, crystalline powder, and yielding chrysophanic acid on decomposition.
Wiktionary
chrysophane
n. (context organic compound English) A glucoside extracted from rhubarb as a bitter, yellow, crystalline powder, yielding chrysophanic acid on decomposition.