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caffeine
[ ka-feen, kaf-een, kaf-ee-in ]
noun
- Chemistry, Pharmacology. a white, crystalline, bitter alkaloid, C 8 H 10 N 4 O 2 , usually derived from coffee or tea: used in medicine chiefly as a nervous system stimulant.
- Informal. a drink, usually coffee or tea, containing this stimulant:
We sipped our caffeine on the balcony with its views of sea stacks, rocky coves, and the ever-changing ocean.
caffeine
/ ˈkæfiːn; ˈkæfɪˌiːn /
noun
- a white crystalline bitter alkaloid responsible for the stimulant action of tea, coffee, and cocoa: a constituent of many tonics and analgesics. Formula: C 8 H 10 N 4 O 2 See also xanthine
caffeine
- A bitter white alkaloid found in tea leaves, coffee beans, and various other plant parts. It is a mild stimulant. Caffeine is a xanthine and similar in structure to theobromine and theophylline. Chemical formula: C 8 H 10 N 4 O 2 .
Other Word Forms
- ·ڱ· [ka-, fee, -nik, kaf-ee-, in, -ik], adjective
- ԴDz··ڱԱ noun
- non··ڱ· adjective
Word History and Origins
Word History and Origins
Origin of caffeine1
Compare Meanings
How does caffeine compare to similar and commonly confused words? Explore the most common comparisons:
Example Sentences
“It’s a very bitter tea. Some people use it as a coffee replacement because it doesn’t have caffeine, but it has a lovely toasted, bitter flavor.”
While caffeine may help by "reducing sleep inertia", even when these drinks are consumed in the morning, they can still affect you in the evening, he adds.
They also suggest avoiding caffeine, alcohol or large meals before bed, doing gentle exercise and trying to make your bedroom more comfortable, where possible.
Down some decaf I actually stopped drinking caffeine — much to my chagrin — for my anxiety issue, so I’ll make myself a little pot of decaf.
She’d have to look at trigger foods and drinks for hot flashes, like alcohol and caffeine.
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