10. 
    Alkaloid
    Al'ka·loid (ăl'kȧ*loid) noun (Chemistry) An organic base, especially one of a class of substances occurring ready formed in the tissues of plants and the bodies of animals. » Alkaloids all contain nitrogen, carbon, and hyd...
    Found op http://www.encyclo.co.uk/webster/A/56
    
    
11. 
    alkaloid
    <chemistry, pharmacology> One of a large group of nitrogenous substances found in naturally in plants. They are usually very bitter and although the plant may be poisonous, many have extracts that are pharmacologically active. ... Examples are atropine, caffeine, coniine, morphine, nicotine, q...
    Found op http://www.mondofacto.com/facts/dictionary?alkaloid
    
    
12. 
    alkaloid
    noun natural bases containing nitrogen found in plants
    Found op http://wordnetweb.princeton.edu/perl/webwn?s=alkaloid
    
    
13. 
    alkaloid
    (al´kә-loid″) one of a large group of organic, basic substances found in plants. They are usually bitter in taste and are characterized by powerful physiologic activity. Examples are morphine, cocaine, atropine, quinine, nicotine, and caffeine. The term is also applied to synthetic subs...
    Found op http://www.encyclo.co.uk/local/21001
    
    
14. 
    Alkaloid
    • (a.) Alt. of Alkaloidal • (n.) An organic base, especially one of a class of substances occurring ready formed in the tissues of plants and the bodies of animals.
    Found op http://thinkexist.com/dictionary/meaning/alkaloid/
    
    
15. 
    alkaloid
    any of a class of naturally occurring organic nitrogen-containing bases. Alkaloids have diverse and important physiological effects on humans and ... [10 related articles]
    Found op http://www.britannica.com/eb/a-z/a/47
    
    
16. 
    alkaloid
    (alkali + -oid) one of a large group of nitrogenous basis substances found in plants. They are usually very bitter and many are pharmacologically active. Examples are atropine, caffeine, coniine, morphine, nicotine, quinine, strychnine. The term is also applied to synthetic substances (artificial a'...
    Found op http://users.ugent.be/~rvdstich/eugloss/DIC/dictio04.html
    
    
17. 
    Alkaloid
    Alkaloids are a group of naturally occurring chemical compounds that contain mostly basic nitrogen atoms. This group also includes some related compounds with neutral and even weakly acidic properties. Also some synthetic compounds of similar structure are attributed to alkaloids. In addition to ca...
    Found op http://en.wikipedia.org/wiki/Alkaloid
    
    
18. 
    alkaloid
    Any of a group of basic nitrogen-containing organic compounds (mostly heterocyclic) derived from plants and having diverse pharmacological properties. Alkaloids include morphine, cocaine, atropine, quinine, codeine, nicotine, and caffeine, some of which are used in medicine as analgesics, tranquiliz...
    Found op http://www.daviddarling.info/encyclopedia/A/alkaloid.html
    
    
19. 
    alkaloid
    alkaloid, any of a class of organic compounds composed of carbon, hydrogen, nitrogen, and usually oxygen that are often derived from plants. Although the name means alkalilike, some alkaloids do not exhibit alkaline properties. Many alkaloids, though poisons, have physiological effects that render t...
    Found op http://www.infoplease.com/ce6/sci/A0803363.html
    
    
20. 
    Alkaloid
    Alkaloid is a term applied to a class of nitrogenous compounds having basic properties, found in living plants, usually in combination with organic acids. They are usually given names ending in ine, as morphine, quinine, aconitine, nicotine, caffeine, etc. Most alkaloids occur in plants, but some ar...
    Found op http://www.probertencyclopaedia.com/browse/GA.HTM
    
    
21. 
    alkaloid
    Any of a number of physiologically active and frequently poisonous substances contained in some plants. They are usually organic bases and contain nitrogen. They form salts with acids and, when soluble, give alkaline solutions. Substances in this group are included by custom rather than by scientifi...
    Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0009896.html
    
    
22. 
    alkaloid
    A member of a large group of substances found in plants and in some fungi. Alkaloids contain nitrogen and can be made in the laboratory. Nicotine, caffeine, codeine, and vincristine are alkaloids. Some alkaloids, such as vincristine, are used to treat cancer.
    Found op http://www.cancer.gov/dictionary?expand=A
    
    

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