caffeine

POS

Noun

HYPHEN

caf=feine

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CIDE DICTIONARY

caffeine, n. [Cf. F. caféine. See Coffee.].

A white, bitter, crystallizable substance, found in coffee and tea. It is identical with the alkaloid theine from tea leaves, and with guaranine from guarana. It is responsible for most of the stimulating effect of coffee or tea. [1913 Webster]

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OXFORD DICTIONARY

caffeine, n. an alkaloid drug with stimulant action found in tea leaves and coffee beans.

Etymology

F caf{eacute}ine f. caf{eacute} coffee

For further exploring for "caffeine" in Webster Dictionary Online

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