Topic: DRUGS, MEDICINES

Date: 1800-1900
Language: German
Origin: kaffein, from kaffee 'coffee', from French café

caffeine

noun
     
caf‧feine [uncountable]
DFMD a substance in tea, coffee, and some other drinks that makes you feel more active [↪ decaffeinated]:
Avoid caffeine (=drinks with caffeine) before bedtime.
a caffeine-free cola
caffeinated adjective

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