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View synonyms for

caffeine

[ ka-feen, kaf-een, kaf-ee-in ]

noun

  1. 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.
  2. 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

/ ˈkæfiËn; ˈkæfɪˌiËn /

noun

  1. 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
“Collins English Dictionary — Complete & Unabridged†2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

caffeine

/ °ìă-´Úŧ²Ô′ /

  1. 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 .
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Other ˜yÐÄvlogs From

  • ³¦²¹´Ú·´Ú±ð¾±²Ô·¾±³¦ [ka-, fee, -nik, kaf-ee-, in, -ik], adjective
  • ²Ô´Ç²Ô·³¦²¹´Ú·´Ú±ð¾±²Ô±ð noun
  • non·³¦²¹´Ú·´Ú±ð¾±²Ô·¾±³¦ adjective
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˜yÐÄvlog History and Origins

Origin of caffeine1

First recorded in 1820–30; from French ³¦²¹´Úé¾±²Ô±ð, equivalent to ³¦²¹´Úé coffee + -ine -ine 2
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˜yÐÄvlog History and Origins

Origin of caffeine1

C19: from German Kaffein, from Kaffee coffee
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Compare Meanings

How does caffeine compare to similar and commonly confused words? Explore the most common comparisons:

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Example Sentences

They also suggest avoiding caffeine, alcohol or large meals before bed, doing gentle exercise and trying to make your bedroom more comfortable, where possible.

From

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.

From

She’d have to look at trigger foods and drinks for hot flashes, like alcohol and caffeine.

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And because cacao has much less caffeine than coffee, fans say it gives them an energetic boost without making them jumpy.

From

She said through her own research she had made changes to her lifestyle to manage her condition, including cutting down her alcohol and caffeine intake as well as engaging in low-impact exercise and prioritising sleep.

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