Last Updated
：2026/01/04
カフェイン
Hiragana
かふぇいん
Noun
Japanese Meaning
中枢神経を興奮させる作用をもつアルカロイドの一種。コーヒー豆、茶葉、カカオ豆、マテ茶の葉などに含まれ、覚醒作用や利尿作用がある。化学式は C8H10N4O2。 / 一般に、コーヒーや紅茶、エナジードリンクなどに含まれている刺激成分として意識されるカフェイン物質。
Easy Japanese Meaning
おちゃなどにふくまれるものでねむけをさますはたらきがある。とりすぎるとねむれない。
Chinese (Simplified) Meaning
一种中枢神经兴奋剂 / 存在于咖啡、茶等中的生物碱成分 / 具有提神醒脑作用的化学物质
Chinese (Traditional) Meaning
咖啡因 / 刺激中樞神經的興奮劑 / 存在於咖啡、茶等飲品中的生物鹼
Korean Meaning
커피나 차 등에 함유된 중추신경계를 자극하는 물질 / 각성 효과를 내는 알칼로이드 / 졸음을 줄이고 집중력을 높이는 성분
Vietnamese Meaning
cafein; hợp chất kích thích trong cà phê, trà, ca cao / chất kích thích hệ thần kinh trung ương, giúp tỉnh táo
Tagalog Meaning
kapeina / pampasiglang sangkap sa kape, tsaa, at tsokolate
Sense（1）
caffeine
（ romanization ）
Quizzes for review
See correct answer
I can't sleep if I consume caffeine.
See correct answer
私はカフェインを摂取すると眠れなくなる。
Japanese - English
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