caféine

/kafein/
1.
nounfeminine

caffeine (a natural stimulant alkaloid found in coffee, tea, cola and many energy drinks; also used as a mild stimulant in medicine)

Cette boisson contient trop de caféine, je n'arriverai pas à dormir ce soir.

This drink has too much caffeine; I won't be able to sleep tonight.

Synonyms:stimulant