Definitions

from The Century Dictionary.

  • noun An alkaloid, C8H10N4O2, crystallizing in slender, silk-like needles which have a bitter taste, found in coffee-beans.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Alternative spelling of caffeine.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects

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