Online Dictionary

caffeine Explained

caffeine at CMU American English spelling Of Explained:


caffeine at English => English (English Etymology) Of Explained:

1830, from Ger. Kaffein, coined by chemist F.F. Runge (1795-1867) after Mod.L. coffea "coffee" + chemical suffix -ine. ///

caffeine at English => English (Longman) Of Explained:

n [U] [Date: 1800-1900; Language: German; Origin: kaffein, from kaffee 'coffee', from French cafe]// a substance in tea, coffee, and some other drinks that makes you feel more active// decaffeinated// --Avoid caffeine (=drinks with caffeine) before bedtime.// --a caffeine-free cola// -- caffeinated/k[zB024]f[hA369]ne[hA366]t[hA369]d/ adj //

caffeine at English => English (The Britannica Concise) Of Explained:

Heterocyclic compound that, like other alkaloids, has marked physiological effects. It occurs in coffee beans, tea leaves, kola nuts, cacao, maté , and guarana, and in the products made from them. Its stimulating effect on the central nervous system, heart, cardiovascular system, and kidneys makes it medically useful in treating respiratory depression caused by overdose of barbiturates, morphine, or heroin. Its positive effects can include improved motor performance, decreased fatigue, increased alertness, and enhanced sensory activity. Excessive caffeine can produce irritability, anxiety, insomnia, and potentially serious symptoms such as heart irregularities and delirium. Much of the caffeine included in products such as NoDoz and in many over-the-counter cold remedies and painkillers has been removed from decaffeinated coffee and tea.

caffeine at English => English (Oxford Advanced Learners) Of Explained:

[U] a drug found in coffee and tea that makes you feel more active

Caffeine at English => English (Websters 1913) Of Explained:

Caffeine \Caf*fe"ine\, n. [Cf. F. caf['e]ine. See {Coffee}.]
A white, bitter, crystallizable substance, obtained from
coffee. It is identical with the alkaloid {theine} from tea
leaves, and with {guaranine} from guarana.

caffeine at English => English (WordNet) Of Explained:

n : a bitter alkaloid found in coffee and tea that is
responsible for their stimulating effects [syn: {caffein}]

caffeine at English (WD) Of Explained:


Alternative forms

* caffein


From Inter: etyl » fr|en Inter: term » caféine|lang=fr, from Inter: term » café|lang=fr||coffee or Inter: etyl » de|en Inter: term » Koffein|lang=de, from Inter: term » Kaffee|lang=de||coffee


* Inter: IPA » /ˈkæfiːn/ or Inter: IPAchar » /kæˈfiːn/


Inter: en-noun » -
  • An alkaloid, C8H10N4O2, found naturally in tea and coffee plants which acts as a mild stimulant of the central nervous system.


    Inter: trans-top » alkaloid found naturally in tea and coffee plants
    • Arabic: Inter: t- » ar|كافيين|m|tr=kafiyiin
    • Catalan: Inter: t- » ca|cafeïna|f
    • Chinese:
    • : Mandarin: Inter: t- » cmn|咖啡因|tr=kāfēiyīn|sc=Hani
    • Czech: Inter: t- » cs|kofein|m
    • Danish: Inter: t- » da|koffein|n|c
    • Esperanto: Inter: t- » eo|kafeino
    • Finnish: Inter: t+ » fi|kofeiini
    • French: Inter: t+ » fr|caféine|f
    • German: Inter: t+ » de|Koffein|n, Inter: t+ » de|Coffein|n
    • Greek: Inter: t+ » el|καφεΐνη|tr=kafeḯni̱
    • Hebrew: Inter: t- » he|קפאין
    • Hindi: Inter: t- » hi|कैफीन|tr=kaiphīn
    • Hungarian: Inter: t+ » hu|koffein
    • Icelandic: Inter: t+ » is|koffín|n, Inter: qualifier » dated Inter: t+ » is|kaffín|n

    Inter: trans-mi » d
  • Italian: Inter: t- » it|caffeina|f
  • Japanese: Inter: t- » ja|カフェイン|tr=kafein
  • Korean: Inter: t+ » ko|카페인|tr=kapein|sc=Hang
  • Macedonian: Inter: t- » mk|кофеин|m|tr=kofeín|sc=Cyrl
  • Malagasy: Inter: t- » mg|kafeinina, Inter: t+ » mg|kafeina
  • Norwegian:
  • : Bokmål: Inter: t- » no|koffein|m|n
  • : Nynorsk: Inter: t- » nn|koffein|m|n
  • Portuguese: Inter: t+ » pt|cafeína|f
  • Russian: Inter: t+ » ru|кофеин|m|tr=kofeín
  • Scottish Gaelic: Inter: t- » gd|caifein|m
  • Serbo-Croatian: Inter: t- » sh|kofein|m|alt=kofèīn
  • Spanish: Inter: t+ » es|cafeína|f
  • Swedish: Inter: t- » sv|koffein|n
  • Thai: Inter: t- » th|คาเฟอีน|tr=kaa-fay-een
  • Turkish: Inter: t+ » tr|kafein
  • Volapük: Inter: t- » vo|kafein

  • Inter: trans-botto » m

    See also

    * Inter: pedi » a
    Category: Category:English words not following the I before E except after C rule -
    Category: Category:en:Coffee -
    Category: Category:en:Tea -



    caffeine {{f}}
  • Inter: plural of » caffeina|lang=it

  • Translation: et » caffeine
    Translation: es » caffeine
    Translation: fr » caffeine
    Translation: ko » caffeine
    Translation: io » caffeine
    Translation: id » caffeine
    Translation: kn » caffeine
    Translation: ku » caffeine
    Translation: hu » caffeine
    Translation: mg » caffeine
    Translation: my » caffeine
    Translation: pl » caffeine
    Translation: fi » caffeine
    Translation: ta » caffeine
    Translation: th » caffeine
    Translation: tr » caffeine
    Translation: vi » caffeine
    Translation: zh » caffeine