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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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Research from Queen Mary University of London suggests that caffeine can activate an ancient cellular energy system involved in growth, stress resistance, and DNA repair.

From Science Daily Sep. 9, 2026

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

From BBC Sep. 8, 2026

I had recently told Mona, my older sister, about the caffeine liaison, and I instantly had regretted it as I glanced at her text.

From Los Angeles Times Aug. 7, 2026

These shots of concentrated caffeine are meant to be sipped, not sniffed, but one whiff of a ragingly popular one—bouquet de Dubble Bubble and wet sneakers—was enough to put me off them forever.

From The Wall Street Journal Aug. 6, 2026

They were laying off sugar or carbs or caffeine or meat or dairy, but maybe a little butter was fine now and then.

From "We Are Okay" by Nina LaCour




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