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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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Instead of acting directly on TOR, caffeine appears to work through another major cellular system called AMPK.

From Science Daily Sep. 9, 2026

That caffeine reference was perhaps as much to the time zone, as nod to the city's famous café culture.

From BBC Sep. 9, 2026

"Fortunately I've got over the caffeine withdrawals," he said.

From BBC Sep. 8, 2026

I enjoy breakfast food a lot, but if I want to have an eventful fun day, I need to just get the breakfast out of the way and get some caffeine in me.

From Los Angeles Times Aug. 14, 2026

I had been cultivating a headache for the last few hours—the kind of headache that felt like it was going to pop my eyes right out of my skull—and caffeine usually helped.

From "Darius the Great Is Not Okay" by Adib Khorram




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