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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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If the measurement is higher or lower than “ideal,” the app provides a short blurb about what that could mean, like I could have slept poorly or had too much caffeine.

From Slate ● Oct. 9, 2026

The functional food trend is pushing caffeine where protein went before it, into a range of packaged foods and drinks from beef jerky to water.

From The Wall Street Journal ● Oct. 7, 2026

"Coffee is more than just caffeine -- it's a complex dietary factor that interacts with our gut microbes, our metabolism, and even our emotional well-being," said Professor Cryan.

From Science Daily ● Sep. 28, 2026

But Tarasenko, 26, is unable to feed his caffeine habit, as his favourite fizzy drink is no longer in stock at his local supermarket.

From Barron's ● Sep. 27, 2026

I can do this two-job thing, is my theory, if I can drink enough caffeine and avoid getting distracted by George’s ever more obvious suffering.

From "Nickel and Dimed: On (Not) Getting By in America" by Barbara Ehrenreich




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