Look up: coumarin

1. Coumarin
   A substance that deters feeding by certain insect pests Derived from glucosides in the plant, it is formed when tissues are disrupted by the feeding insect.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
2. coumarin
   (= O-hydroxycinnamic acid) Pleasant-smelling compound found in many plants and released on wilting (probably a major component of the smell of fresh hay). Has anticoagulant activity by competing with Vitamin K. Coumarin derivatives have anti-inflammatory and antimetastatic properties and inhibit xanthine oxidase and the production of 5-HETE by neutrophils and macrophages. Various derivatives have these activities including esculentin, esculin (6,7-dihydroxycoumarin 6-O-D-glucoside), fraxin, umbelliferone (7-hydroxy coumarin) and scopoletin (6-methoxy-7-hydroxy-coumarin).
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3. Coumarin
   Cou'ma·rin (kō'mȧ*rĭn) noun [ French, from coumarou , a tree of Guiana.] (Chemistry) The concrete essence of the tonka bean, the fruit of Dipterix (formerly Coumarouna) odorata and consisting essentially of couma...
   Found on http://www.encyclo.co.uk/webster/C/170
   
   
4. coumarin
   <drug> O hydroxycinnamic acid. Pleasant smelling compound found in many plants and released on wilting (probably a major component of the smell of fresh hay). Has anticoagulant activity by competing with Vitamin K. ... (18 Nov 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
5. coumarin
   (koo´mә-rin) a principle extracted from the tonka bean, from which several anticoagulants are derived that inhibit hepatic synthesis of vitamin K–dependent coagulation factors. any of these derivatives.
   Found on http://www.encyclo.co.uk/local/21001
   
   
6. Coumarin
   • (n.) The concrete essence of the tonka bean, the fruit of Dipterix (formerly Coumarouna) odorata and consisting essentially of coumarin proper, which is a white crystalline substance, C9H6O2, of vanilla-like odor, regarded as an anhydride of coumaric acid, and used in flavoring. Coumarin in a...
   Found on http://thinkexist.com/dictionary/meaning
   
   
7. coumarin
   an organic compound having the characteristic odour of new-mown hay, obtainable from the tonka tree (native to Guyana) or by chemical synthesis. It ... [3 related articles]
   Found on http://www.britannica.com/eb/a-z/c/149
   
   
8. Coumarin
   Coumarin is a vegetable proximate principle, obtained from the Dipterix odordta or Tonka bean, sweet woodruff, sweet-scented vernal grass, melilot, etc. It has a pleasant aromatic odour, and a burning taste. It is used in perfumery, in medicine, and to give flavour to certain varieties of Swiss cheese.
   Found on http://www.probertencyclopaedia.com/brow
   
   
9. coumarin
   Type: Term Pronunciation: kū′mă-rin Definitions: 1. A general descriptive term applied to anticoagulants and other drugs derived from dicumarol, a component of the Tonka bean. 2. A fragrant neutral principle obtained from the Tonka bean, Dypterix odorata, and made synthetically from ...
   Found on http://www.medilexicon.com/medicaldictio
   
   
10. coumarin
    A substance used to make drugs that prevent and treat blood clots in blood vessels and treat certain heart conditions. Coumarin is taken from certain plants and can also be made in the laboratory. It is a type of anticoagulant.
    Found on http://www.cancer.gov/dictionary?expand=
    
    
11. Coumarin
    --> `Coumarin` (2H-chromen-2-one, ) is a fragrant chemical compound of benzopyrone found in many plants, notably in high concentration in the tonka bean (Dipteryx odorata), vanilla grass (Anthoxanthum odoratum), sweet woodruff (Galium odoratum), mullein (Verbascum ...
    Found on http://en.wikipedia.org/wiki/Coumarin