• Webster's Revised Unabridged Dictionary
    • n Theobromine (Chem) An alkaloidal ureide, C7H8N4O2, homologous with and resembling caffeine, produced artificially, and also extracted from cacao and chocolate (from Theobroma Cacao) as a bitter white crystalline substance; -- called also dimethyl xanthine.
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Century Dictionary and Cyclopedia
  • Interesting fact: Chocolate can be fatal to dogs. Chocolate contains a chemical theobromine, which is poisonous to dogs
    • n theobromine A crystalline alkaloid (C7H8N4O2), forming salts with acids, volatile and very bitter. In composition it is nearly related to thein or caffein. It is found in the seeds of Theobroma Cacao.
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Chambers's Twentieth Century Dictionary
  • Interesting fact: The theobromine in chocolate that stimulates the cardiac and nervous systems is too much for dogs, especially smaller pups. A chocolate bar is poisonous to dogs and can even be lethal.
    • n Theobromine an alkaloid principle, similar to theine and caffeine, existing in the chocolate nut
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Chambers's Twentieth Century Dictionary
Gr., theos, a god, brōma, food.


In literature:

Both contain stimulating alkaloids, theobromine and caffeine, and fat is a notable constituent of cocoa.
"The Home of the Blizzard" by Douglas Mawson
The active principle of tea is called theine; that of coffee, caffeine, and of cocoa, theobromine.
"A Practical Physiology" by Albert F. Blaisdell
Caffeine, it will be remembered, is the methyl ester of theobromine, and can be prepared from it.
"Scientific American Supplement, No. 415, December 15, 1883" by Various
They also contain a crystalline principle analogous to caffeine, called theobromine.
"The Commercial Products of the Vegetable Kingdom" by P. L. Simmonds
This first term gives rise to a series of bodies in lateral groups, of which the most interesting are caffeine and theobromine.
"The Healthy Life, Vol. V, Nos. 24-28" by Various
This bean is rich in protein, fat, carbohydrate, mineral matter, and a stimulant called theobromine.
"Ontario Teachers' Manuals: Household Science in Rural Schools" by Ministry of Education Ontario
Theine, caffeine, and theobromine, all stimulant drugs, are present in tea, coffee, and cocoa, respectively.
"No Animal Food" by Rupert H. Wheldon
Tea and coffee both contain the alkaloid caffeine, whilst cocoa contains theobromine.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 6" by Various

In news:

Three hundred people took part in a clinical trial, in which 60 percent of them stopped hacking when they were given theobromine, a substance that's found in cocoa .
Theobromine for Tooth Decay Prevention.