'Emodin' definitions:

Definition of 'Emodin'

From: GCIDE

Emodin \Em"o*din\, n. (Chem.) An orange-red crystalline substance, C15H10O5, obtained from the buckthorn, rhubarb, etc., and regarded as a derivative of anthraquinone; -- so called from a species of rhubarb (Rheum emodei). [1913 Webster]