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caffeine Definition

caf·feine (ka fēn, kafēn′)

noun

a bitter, crystalline alkaloid, CHNO, present in coffee, tea, kola nuts, etc.: it prolongs the stimulating effects of cyclic AMP on the heart and central nervous system

Etymology: Ger kaffein (now coffeïn, after ModL coffea, coffee); coined by F. F. Runge (1795-1867), Ger chemist < kaffee, coffee (< Fr café < It caffè, coffee) + -in, -ine

caffeine Usage Examples

Converse of object

  • consume: Coffee represents three-quarters of all the caffeine consumed in the USA.
  • contain: A cup of regular instant coffee generally contains less caffeine than a cup of regular brewed coffee.
  • avoid: Avoid too much caffeine, sugar or processed food.
  • drink: I have a thing for retail therapy, for playing music and for drinking too much caffeine.
  • suggest: There is much evidence to suggest that caffeine is associated with low-birth weight and related problems.
  • remove: Carbon dioxide removes the caffeine without spoiling the element which gives this Colombia coffee its full, rich character.

Adjective modifier

  • excess: You are also more likely to respond impulsively and intensely in stressful situations after excess caffeine.
  • pure: The pure caffeine that is extracted is not wasted.
  • much: Category: Tea How much caffeine does tea contain?
  • less: A cup of regular instant coffee generally contains less caffeine than a cup of regular brewed coffee.

Modifies a noun

  • ingestion: Sprint performance and, in particular, the 1,500 meters have responded well to caffeine ingestion.
  • intake: These results contrast markedly with the results of studies on caffeine intake, where a clear dose response is demonstrated.
  • addict: The main event this year was the coffee crawl - bliss for caffeine addicts.
  • consumption: Coffee, tea, and caffeine consumption and incidence of colon and rectal cancer.
  • addiction: Once everyone has got over their caffeine addictions, switch to espresso.
  • concentration: Variable consumer preparation methods would further broaden the range of caffeine concentrations to which consumers could be exposed.

Preposition: during

  • pregnancy: The use of caffeine during pregnancy has been widely studied.

Preposition: in

  • coffee: Is there caffeine in the coffee extracts you use to flavor your products?
  • tea: Some people find that the caffeine in normal tea can add to stress.
  • drink: In the light of these developments, the FAC has reviewed its existing advice on caffeine in soft drinks.

Browse dictionary entries near caffeine

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