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Definition of Caffein
1. Noun. A bitter alkaloid found in coffee and tea that is responsible for their stimulating effects.
Exact synonyms: Caffeine
Substance meronyms: Coffee, Java, Tea
Generic synonyms: Alkaloid
Derivative terms: Caffeinic
Substance meronyms: Coffee, Java, Tea
Generic synonyms: Alkaloid
Derivative terms: Caffeinic
Definition of Caffein
1. caffeine [n -S] - See also: caffeine