Emodin

1 definition found

From The Collaborative International Dictionary of English v.0.48 [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]