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caffeine
'caffeine' - used as a noun
1. a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
Variations of 'caffeine'
 
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Who Said that ?
Nature, to be commanded, must be obeyed. - Click here to find out.
Fact of the day
The chemical name for caffeine is 1,3,7-trimethylzantihine.