n. [ Gr. e'y^ well + &unr_; yellow. ] (Chem.) A yellow pigment imported from India and China. It has a strong odor, and is said to be obtained from the urine of herbivorous animals when fed on the mango. It consists if a magnesium salt of euxanthic acid. Called also puri, purree, and Indian yellow. [ 1913 Webster ]
n. [ Pref. hypo- + xanthin. ] (Physiol. Chem.) A crystalline, nitrogenous substance, closely related to xanthin and uric acid, widely distributed through the animal body, but especially in muscle tissue; -- called also sarcin, sarkin. [ 1913 Webster ]
n. [ Pref. Para- + xanthin. ] (Physiol. Chem.) A crystalline substance closely related to xanthin, present in small quantity in urine. [ 1913 Webster ]
n. [ Gr. xanqo`s yellow. ] 1. same as xanthine. [ 1913 Webster ]
2. (Chem.) A yellow insoluble coloring matter extracted from yellow flowers; specifically, the coloring matter of madder. [ Formerly written also xanthein. ] [ 1913 Webster ]
3. (Chem.) One of the gaseous or volatile decomposition products of the xanthates, and probably identical with carbon disulphide. [ Obs. ] [ 1913 Webster ]
{ n. Also }. [ Gr. xanqo`s yellow. ] (Physiol. Chem.) A type of purine obtainable as a white microcrystalline powder, C5H4O2N4, present in muscle tissue, in the liver, spleen, pancreas, and other organs, and also in urine (in small quantities) and some urinary calculi, and in the juices of certain plants; -- so called because it leaves a yellow residue when evaporated to dryness with nitric acid. It is also present in guano. Xanthine is closely related to uric acid. [ Webster 1913 Suppl. ]
n. [ Gr. xanqo`s yellow + quinine. ] (Chem.) A complex nitrogenous substance related to urea and uric acid, produced as a white powder; -- so called because it forms yellow salts, and because its solution forms a blue fluorescence like quinine. [ 1913 Webster ]
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