Caffeine meaning

kă-fēn, kăfēn
A bitter white alkaloid, C8 H10 N4 O2 , found in certain plants such as cacao, coffee, kola, and tea, that stimulates the central nervous system and body metabolism and is used in medicine, usually in combination with other drugs, to relieve headaches and treat respiratory conditions in premature infants.
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A bitter, crystalline alkaloid, C8H10N4O2, present in coffee, tea, kola nuts, etc.: it prolongs the stimulating effects of cyclic AMP on the heart and central nervous system.
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A bitter white alkaloid, C8 H10 N4 O2 , found in certain plants such as cacao, coffee, kola, and tea, that stimulates the central nervous system and body metabolism and is used in medicine, usually in combination with other drugs, to relieve headaches and treat respiratory conditions in premature infants.
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A bitter white alkaloid found in tea leaves, coffee beans, and various other plant parts. It is a mild stimulant. Caffeine is a xanthine and similar in structure to theobromine and theophylline. Chemical formula: C8H10N4O2.
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An alkaloid, C8H10N4O2, found naturally in tea and coffee plants which acts as a mild stimulant of the central nervous system.
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Origin of caffeine

  • German Kaffein (from Kaffee coffee) or French caféine both from French café coffee café

    From American Heritage Dictionary of the English Language, 5th Edition

  • From French caféine, from café (“coffee”) or German Koffein, from Kaffee (“coffee”)

    From Wiktionary