noun Herunterladen 🔗Teilen Koffein An alkaloid, C8H10N4O2, found naturally in tea and coffee plants which acts as a mild stimulant on the central nervous system. Examples : "Many students drink coffee for the caffeine to help them stay awake and study. " Viele Studenten trinken Kaffee wegen des Koffeins, um wach zu bleiben und zu lernen. substance drink chemistry compound physiology medicine energy food plant biochemistry Mit KI chattenVokabelspielÜbung: Lesen