caffeine
nounfeminine/kɐfɐˈinɐ/medium
ca·fe·í·na
Definition
A crystalline compound that is found especially in tea and coffee plants and is a stimulant of the central nervous system.
Coffee contains caffeine, which can keep you awake.
Some energy drinks have high levels of caffeine.
Common collocations
caffeine contentcaffeine-freecaffeine addictioneffects of caffeine
Etymology
Do francês 'caféine', de 'café' + sufixo '-ine'.