caffeine
//ˈkæf.iːn//
Noun
1
A bitter white crystalline alkaloid found in coffee, tea, and other plants, that acts as a stimulant on the central nervous system.
Coffee contains caffeine, which helps people stay awake.
A bitter white crystalline alkaloid found in coffee, tea, and other plants, that acts as a stimulant on the central nervous system.
Coffee contains caffeine, which helps people stay awake.