XANTHIN

Noun

xanthin (plural xanthins)

Alternative spelling of xanthine

Usage notes

• There is much confusion between this word and xanthein, and they are often interchanged.

Source: Wiktionary

Xan"thin, n. [Gr. xanqo`s yellow.]

1. (Physiol. Chem.) A crystalline nitrogenous body closely related to both uric acid and hypoxanthin, present in muscle tissue, and occasionally found in the urine and in some urinary calculi. It is also present in guano. So called from the yellow color of certain of its salts (nitrates).

2. (Chem.) A yellow insoluble coloring matter extracted from yellow flowers; specifically, the coloring matter of madder. [Formerly written also xanthein.]

3. (Chem.) One of the gaseous or volatile decomposition products of the xanthates, and probably identical with carbon disulphide. [Obs.]

Xan"thine, n. Also Xan"thin . [Gr. xanqo`s yellow.] (Physiol. Chem.)

Definition: 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.

Source: Webster’s Unabridged Dictionary 1913 Edition

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