Hypertext Webster Gateway: "Xanthine"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Xanthine \Xan"thine\, n. Also Xanthin \Xan"thin\ . [Gr. xanqo`s
yellow.] (Physiol. Chem.)
A white microcrystalline nitrogenous compound, {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. Xanthine is closely related to
uric acid.
From WordNet (r) 1.7 (wn)
xanthine
n : crystalline oxidation product of the metabolism of
nucleoproteins; precursor of uric acid; found in many
organs and in urine
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