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caffeine★★★advanced명사 · noun외래어 · loanword
Meaning
caffeine — Solid matter contained in coffee, tea leaves, etc., that tastes bitter, stimulates one's nerves, and is addictive when taken in large quantities.
caffeine — Solid matter contained in coffee, tea leaves, etc., that tastes bitter, stimulates one's nerves, and is addictive when taken in large quantities.