n. A purgative resin, 6-methyl-1,3,8-trihydroxyanthraquinone, obtained from some rhubarbs and other plants.
the GNU version of the Collaborative International Dictionary of English
n. 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).
The Century Dictionary and Cyclopedia
n. In chem., a glucoside (C15H10O5), crystallizing in orange-yellow prisms, found in the bark of buckthorn and in the root of rhubarb.
Word Usage
"The product, known as emodin, inhibits an enzyme called 11-Beta-HSD1, which plays a role in resistance to insulin, the hormone that helps clear excess sugar from the blood."