caffeine

A substance found in the leaves and beans of the coffee tree, in tea, yerba mate, guarana berries, and in small amounts in cocoa. It can also be made in the laboratory, and is added to some soft drinks, foods, and medicines. Caffeine increases brain activity, alertness, attention, and energy. It may also increase blood pressure, heart rate, breathing rate, and the loss of water from the body in urine.

English dictionary of cancer terms . 2015.

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  • Caffeine — Caffeine …   Deutsch Wikipedia

  • caffeine — caffeine. См. кофеин. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • caffeine — trimethyl derivative of xanthine, 1830, from Ger. Kaffein, coined by chemist F.F. Runge (1795 1867), apparently from Ger. Kaffee coffee (see COFFEE (Cf. coffee)) + chemical suffix INE (Cf. ine) (2) (Ger. in). The form of the English word may be… …   Etymology dictionary

  • caffeine — ► NOUN ▪ a compound which is found in tea and coffee plants and is a stimulant of the central nervous system. DERIVATIVES caffeinated adjective. ORIGIN French caféine, from café coffee …   English terms dictionary

  • caffeine — [ka fēn′, kaf′ēn΄] n. [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, INE3] a bitter, crystalline alkaloid, C8H10N4O2, present in …   English World dictionary

  • Caffeine — This article is about the stimulant drug. For other uses, see Caffeine (disambiguation). Caffeine Systematic (IUPAC) name …   Wikipedia

  • caffeine — caffeinic /ka fee nik, kaf ee in ik/, adj. /ka feen , kaf een, kaf ee in/, n. Chem., Pharm. a white, crystalline, bitter alkaloid, C8H10N4O2, usually derived from coffee or tea: used in medicine chiefly as a nervous system stimulant. Also,… …   Universalium

  • Caffeine — A stimulant found naturally in coffee beans, tea leaves, cocoa beans (chocolate) and kola nuts (cola) and added to soft drinks, foods, and medicines. A cup of coffee has 100 250 milligrams of caffeine. Black tea brewed for 4 minutes has 40 100… …   Medical dictionary

  • caffeine — caf|feine [ˈkæfi:n US kæˈfi:n] n [U] [Date: 1800 1900; : German; Origin: kaffein, from kaffee coffee , from French café] a substance in tea, coffee, and some other drinks that makes you feel more active →↑decaffeinated ▪ Avoid caffeine (=drinks… …   Dictionary of contemporary English

  • caffeine — caf|feine [ kæ,fin ] noun uncount a substance in coffee and tea that makes you feel awake. Drinks that have had the caffeine removed are decaffeinated or caffeine free …   Usage of the words and phrases in modern English

  • caffeine — UK [ˈkæfiːn] / US [ˈkæˌfɪn] noun [uncountable] a substance in coffee and tea that makes you feel awake. Drinks that have had the caffeine removed are decaffeinated or caffeine free …   English dictionary

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