Look up: Caffeine

1. 
   Caffeine
   Caffeine (Theine or methyl-theobromine) is a white, bitter, crystalline alkaloid usually derived from coffee or tea and used in medicine as a nervous system stimulant. It was discovered in coffee by Runge in 1820, and in tea by Oudry in 1827.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   caffeine
   [n] - a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. 
   Caffeine
   The drug contained in coffee and tea. This is the stuff that makes coffee so addictive. It stimulates the central nervous system and, in the right amounts, causes adrenaline to be released and can enhance heart function. It helps with intellect, defends the body, and can even enhance sex! See the caffeine section of Coffee World for more information.
   Found on http://www.realcoffee.co.uk/Article.asp?
   
   
4. 
   Caffeine
   Photograph of a caffeine molecular model, courtesy of Indigo® Instruments.A substance found in tea, coffee, and cola that acts as a stimulant. It is extremely soluble in supercritical fluid carbon dioxide and somewhat soluble in water; aqueous solutions of caffeine quickly break down. Symbol C₈H₁₀N₄O₂
   Found on http://www.diracdelta.co.uk/science/sour
   
   
5. 
   caffeine
   (C₈H₁₀N₄O₂) methyltheobromine; guaranine; 1,3,7-trimethylxanthine; 1,3,7-trimethyl-2,6-dioxopurine. A substance found in tea, coffee, and cola that acts as a stimulant. It is extremely soluble in supercritical fluid carbon dioxide and somewhat soluble in water; aqueous solutions of caffeine quickly break...
   Found on http://antoine.frostburg.edu/chem/senese
   
   
6. 
   Caffeine
   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 milligrams. Green tea has one-third as much caffeine as black tea. Caffeine is an alkaloid. It i ...
   Found on http://www.medterms.com/script/main/art.
   
   
7. 
   caffeine
   A xanthine derivative that elevates cAMP levels in cells by inhibiting phosphodiesterases.
   Found on http://www.mblab.gla.ac.uk/dictionary/
   
   
8. 
   Caffeine
   Caf·fe'ine noun [ Confer French caféine . See Coffee .] (Chemistry) A white, bitter, crystallizable substance, obtained from coffee. It is identical with the alkaloid theine from tea leaves, and with guaranine from guarana.
   Found on http://www.encyclo.co.uk/webster/C/5
   
   
9. 
   caffeine
   <chemical> A xanthine derivative that elevates cAMP levels in cells by inhibiting phosphodiesterases. ... (18 Nov 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
10. 
    caffeine
    caffein noun a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
11. 
    Caffeine
    `Caffeine` is a stimulant drug. It is a xanthine alkaloid compound that acts as a psychoactive stimulant and diuretic in humans. The word comes from the French term for coffee, café. Caffeine is also called `guaranine` when found in guarana, `mateine` when found in mate, and `theine` when found in tea; all of these names are synonyms for the same chemical compound. Caffeine is found in varying quantities in the beans, leaves, and fruit of over 6...
    Found on http://en.wikipedia.org/wiki/Caffeine
    
    
12. 
    caffeine
    (kă-fēn´) (kaf´ēn) a xanthine compound found in coffee, tea, chocolate, and colas; it is a central nervous system stimulant, diuretic, striated muscle stimulant, and acts on the cardiovascular system. As the base or the citrate salt, it is used as a central nervous system stimulant ...
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
13. 
    Caffeine
    • (n.) A white, bitter, crystallizable substance, obtained from coffee. It is identical with the alkaloid theine from tea leaves, and with guaranine from guarana.
    Found on http://thinkexist.com/dictionary/meaning
    
    
14. 
    caffeine
    nitrogenous organic compound of the alkaloid group, substances that have marked physiological effects. Caffeine occurs in tea, coffee, guarana, ... [9 related articles]
    Found on http://www.britannica.com/eb/a-z/c/4
    
    
15. 
    Caffeine
    C8H10N4O2 Molar mass: 194.1906
    Found on http://www.convertunits.com/molarmass/Ca
    
    
16. 
    caffeine
    Or trimethylxanthine (C₈H₁₀N₄O₂), an alkaloid extracted from coffee, and also found in tea, cocoa, and cola. Caffeine stimulates the central nervous system and heart, and is a diuretic. It increases alertness...
    Found on http://www.daviddarling.info/encyclopedi
    
    
17. 
    Caffeine
    A stimulating compound found in tea.
    Found on http://www.hungrymonster.com/Foodfacts/T
    
    
18. 
    Caffeine
    An alkaloid that can be found in coffee, tea, soft drinks, chocolate, medications and a variety of other foods. Consuming large amounts of caffeine during pregnancy has been linked to birth defects in the fetus. A nursing mother should avoid or limit the amount of caffeine she consumes while breastfeeding because caffeine does pass through the br...
    Found on http://www.pregnology.com/AZ/C/1
    
    
19. 
    caffeine
    caffeine (kăfēn') , odorless, slightly bitter alkaloid found in coffee, tea, kola nuts (see cola), ilex plants (the source of the Latin American drink maté), and, in small amounts, in cocoa (see cacao). It can also be prepared synthetically from uric acid. While relatively har...
    Found on http://www.infoplease.com/ce6/sci/A08097