xanthine

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xan·thine

 (zăn′thēn′, -thĭn)
n.
1. A yellowish-white, crystalline purine base, C5H4N4O2, that is a precursor of uric acid and is found in blood, urine, muscle tissue, and certain plants.
2. Any of several derivatives of this compound.

xanthine

(ˈzænθiːn; -θaɪn)
n
1. (Elements & Compounds) a crystalline compound related in structure to uric acid and found in urine, blood, certain plants, and certain animal tissues. Formula: C5H4N4O2
2. (Elements & Compounds) any substituted derivative of xanthine, esp one of the three pharmacologically active methylated xanthines, caffeine, theophylline, or theobromine, which act as stimulants and diuretics

xan•thine

(ˈzæn θin, -θɪn)

n.
1. a crystalline, nitrogenous compound, C5H4N4O2, related to uric acid, occurring in urine, blood, and certain animal and vegetable tissues.
2. any derivative of this compound.
[1855–60; < French; see xantho-, -ine2]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.xanthine - crystalline oxidation product of the metabolism of nucleoproteins; precursor of uric acid; found in many organs and in urine
organic compound - any compound of carbon and another element or a radical
Translations
xantin
Xanthin
xanthine

xan·thine

n. xantina, grupo de substancias tales como la cafeína estimulantes del sistema nervioso central y del corazón.
References in periodicals archive ?
The improvements in lung function and quality of life seen with once-daily StriverdiA RespimatA are remarkable when you consider that patients in the control group were continuing with their usual care background therapies, including long- and short-acting anticholinergics, short-acting beta agonists, inhaled corticosteroids and xanthines.
Xanthines are "side door bronchodilators" because we do not know how they actually work.
BAZZA High-Energy Tea delivers as much energy per ounce as existing energy drinks, but relies solely on the naturally-occurring xanthines found in four of BAZZA's natural ingredients: green tea, yerba mate, guarana, and cola nut.
Because of tautomerism (hydrogen shifts within the molecule), xanthines such as caffeine appear to have phenolic structure, but the preferred chemical structure in xanthines is the ketone.
Usual care background therapy included long- and short-acting anticholinergics, short-acting beta agonists, inhaled corticosteroids and xanthines.