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emodin |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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}).