xanthine
(noun) crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine
Source: WordNet® 3.1
xanthine (plural xanthines)
(chemistry) Any of a group of alkaloids that include caffeine, theophylline, and theobromine as well as the parent compound, a precursor of uric acid found in many organs of the body.
• There is much confusion between this word and xanthein, and they are often interchanged.
• xanthein
Source: Wiktionary
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
18 June 2025
(noun) large South American evergreen tree trifoliate leaves and drupes with nutlike seeds used as food and a source of cooking oil
The world’s most expensive coffee costs more than US$700 per kilogram. Asian palm civet – a cat-like creature in Indonesia, eats fruits, including select coffee cherries. It excretes partially digested seeds that produce a smooth, less acidic brew of coffee called kopi luwak.
