caffeine

名词 caffeine:

1. a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
   同义词：caffein

caffeine 也作 caf.fein

n.（名词）
A bitter white alkaloid, C8H 0N 4O 2, often derived from tea or coffee and used in medicine chiefly as a mild stimulant and to treat certain kinds of headache.
咖啡因：一种苦味的白色生物碱， C8H 0N 4O 2，通常得自咖啡或茶，在药品中主要作为温和兴奋剂及治疗特定的头痛病

来源：
German Kaffein from Kaffee [coffee]
德语 Kaffein 源自 Kaffee [咖啡]
or French caféine
或 法语 caféine
both from French café [coffee] * see café
都源自 法语 café [咖啡] *参见 café

【引伸】
caf.feinat.ed