Caffeine

Pronunciation

• IPA: /ˈkæfiːn/ or

Alternative forms

• caffein

Origin

From French caféine, from café ("coffee") or German Koffein, from Kaffee ("coffee")

Full definition of caffeine

Noun

1. An alkaloid, C₈H₁₀N₄O₂, found naturally in tea and coffee plants which acts as a mild stimulant of the central nervous system.