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A bitter, colorless alkaloid, C7H8N4O2, present in cacao beans and in smaller amounts in tea leaves, kola nuts, and other plant parts, and used in medicine as a diuretic, vasodilator, and myocardial stimulant.

[New Latin Theobrōma, tree genus (Greek theo-, theo- + brōma, food) + -ine.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˌθiːəʊˈbrəʊmiːn; -mɪn)
(Pharmacology) a white crystalline slightly water-soluble alkaloid that occurs in many plants, such as tea and cacao: formerly used to treat asthma. Formula: C7H8N4O2. See also xanthine2
[C18: from New Latin theobroma genus of trees, literally: food of the gods, from theo- + Greek brōma food + -ine2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌθi əˈbroʊ min, -mɪn)

a crystalline alkaloid powder, C7H8N4O2, related to caffeine, obtained from the cacao bean and used chiefly in medicine as a diuretic and stimulant.
[1835–45; < New Latin Theobrom(a) genus of trees that includes cacao (< Greek theo- theo- + brôma food) + -ine2]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
The linear equation for each assayed analyte was as follows: for theobromine (Theb/IS) = -0.001 + 0.056 (concentration), [r.sup.2] = 0.998 (Figure 3(a)); for paraxanthine (Par/IS) = 0.006 + 0.056 (concentration), [r.sup.2] = 0.997 (Figure 3(b)); for theophylline (Theo/IS) = 0.015 + 0.055 (concentration), [r.sup.2] = 0.983 (Figure 3(c)); and for caffeine (Caf/IS) = -0.017 + 0.055 (concentration), [r.sup.2] = 0.995 (Figure 3(d)).
Chocolate contains a substance called theobromine, which is poisonous to dogs.
Chocolate - A chemical in chocolate known as theobromine can cause serious harm to your pet, even in small quantities.
| CHOCOLATE - contains Theobromine, which can be deadly to canines.
Chocolate contains theobromine, a stimulant similar to caffeine, which can cause vomiting, increased heart rate, agitation and seizures in dogs.
Chocolate contains theobromine, a stimulant which can cause vomiting and seizures in dogs.
The most common and often most severe toxicities are produced by theobromine, caffeine, and xylitol.
Yerba mate gives a sustained kick of natural caffeine and theobromine without the crash.
GC-MS analysis from the crude extracts yielded five compounds that were detected (Table 3), namely caffeine, theobromine, gammatocopherol, stigmasterol and beta-sitosterol.
Cocoa beans contain a small amount of caffeine, as well as theobromine, which has a mild stimulating and energising effect.
The guilty ingredient seems to be theobromine, contained in chocolate and easily metabolised by humans but which is processed slowly by dogs and can cause toxic build-up that can prove fatal if left untreated.
Theobromine: Theobromine (3, 7-dimethylxanthine), a white crystalline powder, is an alkaloid readily available in cocoa (240mg/cup) and chocolate (1.89%).