Xanthine
WordNet
noun
(1) Crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine
WiktionaryText
Noun
- 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.
Usage notes
- There is much confusion between this word and , and they are often interchanged.