Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Alternative spelling of caffeine.

from the GNU version of the Collaborative International Dictionary of English

  • n. 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 The Century Dictionary and Cyclopedia

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

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

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

Etymologies

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