caffeine

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Well, the caffeine is a central nervous system disorders and metabolic stimulating.

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Definitions (2)

Toggle American Heritage definitions American Heritage Dictionary (1)

  1. noun A bitter white alkaloid, C8H10N4O2, often derived from tea or coffee and used in medicine chiefly as a mild stimulant and to treat certain kinds of headache.

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Examples (50)

  • "It is interesting that caffeine, which is thought to have a negative connotation, has already been shown to be associated with lower incidences of non-melanoma skin cancers in several epidemiological studies," she added. —  BusinessWeek.com --
  • There is some evidence that caffeine, which is a stimulant, can enhance performance and may rev up your metabolism in the short-term but, experts say, probably not over the long-term. —  Breaking News: CBS News
  • Children are super-sensitive to caffeine, which is highly addictive. —  Anorak News
  • Too much caffeine, alcohol and too little sleep are all things medical experts say can trigger heart palpitations or cardiac arrhythmia. —  RNews - TOP STORIES
  • Gosh, you'd think caffeine was a drug or something. —  Comic Book Resources
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This word has been looked up 76 times.

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Etymologies (1)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. German Kaffein (from Kaffee, coffee) or French caféine, both from French café, coffee; see café.
 

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/kæˈfi ɪn/
by American Heritage
by Lee Davis-Thalbourne

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You can expect to see this word exactly 42 times a year.

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