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caffeine
(redirected from Trimethylxanthine)

    Also found in: Medical, Encyclopedia, Wikipedia 0.04 sec.

caffeine

Alkaloid organic substance found in tea, coffee, and kola nuts; it stimulates the heart and central nervous system. When isolated, it is a bitter crystalline compound, C8H10N4O2. Too much caffeine (more than six average-size cups of tea or coffee a day) can be detrimental to health.



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