Xanthin

2 definitions found

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

  Xanthin \Xan"thin\, 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] Xanthine

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

  Xanthine \Xan"thine\, n. Also Xanthin \Xan"thin\ . [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.]