theobromine

[thee-uh-broh-meen, -min]
noun Pharmacology.
a white, crystalline, water-insoluble, poisonous powder, C 7 H 8 N 4 O 2 , an isomer of theophylline and lower homologue of caffeine, occurring in tea and obtained from the cacao bean: used chiefly as a diuretic, myocardial stimulant, and vasodilator.

Origin:
1835–45; < Neo-Latin Theobrom(a) genus of trees typified by cacao (< Greek theo- theo- + brôma food) + -ine2

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World English Dictionary
theobromine (ˌθiːəʊˈbrəʊmiːn, -mɪn)
 
n
See also xanthine a white crystalline slightly water-soluble alkaloid that occurs in many plants, such as tea and cacao: formerly used to treat asthma. Formula: C7H8N4O2
 
[C18: from New Latin theobroma genus of trees, literally: food of the gods, from theo- + Greek brōma food + -ine²]

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American Heritage
Medical Dictionary

theobromine the·o·bro·mine (thē'ō-brō'mēn')
n.
A bitter, colorless alkaloid found in chocolate products and used as a diuretic, vasodilator, and myocardial stimulant.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
theobromine   (thē'ō-brō'mēn')  Pronunciation Key 
A bitter, colorless alkaloid that occurs in the cacao bean, cola nuts, and tea. It is found in chocolate products and used in medicine as a diuretic, vasodilator, and myocardial stimulant. Theobromine is a xanthine and similar in structure to caffeine and theophylline. Chemical formula: C7H8N4O2.
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Encyclopedia Britannica
Encyclopedia

theobromine

diuretic drug and major alkaloidal constituent of cocoa. Theobromine is a xanthine alkaloid, a methylxanthine, as are caffeine and theophylline, but it differs from them in having little stimulatory action upon the central nervous system. The stimulant effect of cocoa results from the caffeine that it contains rather than from the theobromine.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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Example sentences for theobromine
Coffee also contains trace amounts of theophylline, but no theobromine.
Theobromine is also the principal alkaloid in cocoa, and therefore chocolate.
Chocolate is a mild stimulant to humans mainly due to the presence of theobromine.
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