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Definitions

caffeine

[ka-feen, kaf-een, kaf-ee-in] / kæˈfin, ˈkæf in, ˈkæf i ɪn /


Example Sentences

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Genetics also play a role, since some people naturally break down caffeine faster than others.

From Science Daily • May 18, 2026

Age matters because children have smaller, less developed livers that metabolize caffeine more slowly.

From Science Daily • May 18, 2026

Research reviews show caffeine from coffee, cola, energy drinks, and chocolate can raise systolic blood pressure by 3-15 and diastolic blood pressure by 4-13 after consumption.

From Science Daily • May 18, 2026

Coffee and tea contain other compounds beyond caffeine that may benefit the brain as well.

From Science Daily • May 13, 2026

His senses tingled like he’d been injected with caffeine.

From "The Son of Neptune" by Rick Riordan




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