noun 다운로드 🔗공유 카페인 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. " 많은 학생들이 깨어 있고 공부하기 위해 카페인 섭취를 위해 커피를 마신다. substance drink chemistry compound physiology medicine energy food plant biochemistry AI와 채팅어휘 게임독해 연습