CAFFEINE

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does caffeine mean? 

• CAFFEINE (noun)
  The noun CAFFEINE has 1 sense:

1. a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects

  Familiarity information: CAFFEINE used as a noun is very rare.

 Dictionary entry details 

• CAFFEINE (noun)

Sense 1

Meaning:

A bitter alkaloid found in coffee and tea that is responsible for their stimulating effects

Classified under:

Nouns denoting substances

Synonyms:

caffein; caffeine

Hypernyms ("caffeine" is a kind of...):

alkaloid (natural bases containing nitrogen found in plants)

Holonyms ("caffeine" is a substance of...):

coffee; java (a beverage consisting of an infusion of ground coffee beans)

tea (a beverage made by steeping tea leaves in water)

 Context examples 

If you have questions about whether caffeine is safe for you, talk with your health care provider.

(Caffeine, Food and Drug Administration)

Commercial citrate of caffeine, though not a definite salt.

(Caffeine Citrate, NCI Thesaurus)

Lower mortality was present regardless of whether people drank regular or decaffeinated coffee, suggesting the association is not tied to caffeine.

(Drink Coffee for a Longer Life, The Titi Tudorancea Bulletin)

The determination of the amount of caffeine present in a sample.

(Caffeine Measurement, NCI Thesaurus)

Caffeine is a central nervous system stimulant and may reduce chemotherapy-related fatigue.

(Guarana Supplement, NCI Thesaurus)

Role of caffeine in cancer causation or prevention and in general health.

(Nutrition, Caffeine, NCI Thesaurus)

Nerve problems, too much fluid, or too much caffeine can cause it.

(Overactive Bladder, NIH: National Institute of Diabetes and Digestive and Kidney Diseases)

Caffeine is a central nervous system stimulant and causes constriction of dilated cerebral blood vessels.

(Excedrin, NCI Thesaurus)

A measurement of the caffeine in a biological specimen.

(Caffeine Measurement, NCI Thesaurus/CDISC)

Avoid any drinks that have caffeine.

(Dehydration, NIH)