Look up: Selenium

1. selenium
   [n] - a toxic nonmetallic element related to sulfur and tellurium
   Found on http://www.webdictionary.co.uk/definitio
   
   
2. Selenium
   Selenium exists in several allotropic forms; red selenium is monoclinic and contains Se₈ rings. It has a melting point of 180°C and a relative density of 4.45. The grey (metallic) form of selenium is formed when other varieties are heated to 200°C; this has a melting point of 220°C and...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
3. Selenium
   Antioxidant mineral that you need in tiny amounts in your diet to help keep your immune system healthy. May help prevent cell damage that can lead to cancer. Selenium is in meat, fish and seafood, eggs and cereals. Deficiency is very rare in the UK.
   Found on http://www.cancerhelp.org.uk/utilities/g
   
   
4. Selenium
   an element needed by the body only in very small amounts that helps maintain tissue elasticity
   Found on http://www.medichecks.com/glossary.cfm?l
   
   
5. Selenium
   Selenium: An essential trace mineral that functions largely in the form of proteins, called selenoproteins, which act as enzymes and help prevent damage to cells in the body by oxidants in the environment or those produced by normal metabolism. The recommended dietary allowance (RDA) is currently 55...
   Found on http://www.medterms.com/script/main/art.
   
   
6. selenium
   non-metallic element having the property that its electrical resistance varies inversely with incident light; used in multicrystalline form to make various devices; e.g. electrical rectifiers and photoresistive elements Category: Physics • chemical element:atomic number 34 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
7. Selenium
   Light-sensitive substance which, when used in a barrier-layer construction, generates electrical current when exposed to light. Used in exposure meters. Needs no external power supply.
   Found on http://www.rodsmith.org.uk/photographic%
   
   
8. selenium
   Essential trace element that must be provided as a supplement in serum-free culture media for most animal cells.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
9. Selenium
   Se·le'ni·um noun [ New Latin , from Greek selh`nh the moon. So called because of its chemical analogy to tellurium (from Latin tellus the earth), being, as it were, a companion to it.] (Chemistry) A nonmetallic element o...
   Found on http://www.encyclo.co.uk/webster/S/56
   
   
10. selenium
    <element> Essential trace element that must be provided as a supplement in serum free culture media for most animal cells. ... (18 Nov 1997) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
11. selenium
    Se noun a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)
    Found on http://wordnetweb.princeton.edu/perl/web
    
    
12. selenium
    (Se) (sә-le´ne-әm) a chemical element, atomic number 34, atomic weight 78.96. It is an essential mineral nutrient. Dietary sources of selenium include seafoods, kidney, and liver. Humans can adjust their homeostasis mechanism for selenium over a wide range of dietary intakes. Rec...
    Found on http://www.encyclo.co.uk/local/21001
    
    
13. Selenium
    • (n.) A nonmetallic element of the sulphur group, and analogous to sulphur in its compounds. It is found in small quantities with sulphur and some sulphur ores, and obtained in the free state as a dark reddish powder or crystalline mass, or as a dark metallic-looking substance. It exhibits und...
    Found on http://thinkexist.com/dictionary/meaning
    
    
14. selenium
    a chemical element in the oxygen family (Group VIa) of the periodic table, closely allied in chemical and physical properties with the elements ... [13 related articles]
    Found on http://www.britannica.com/eb/a-z/s/60
    
    
15. selenium
    selenium 1. A gray, crystalline, nonmetalic element (symbol Se) of the sulfur group, varying greatly in electrical resistance under the influence of light [New Latin from Greek selene the moon]. 2. Information is located at Chemical Element: selenium . In 1818, a Swedish chemist, Jöns Jacob B...
    Found on http://www.wordinfo.info/words/index/inf
    
    
16. selenium
    selenium (sulē'nēum) , nonmetallic chemical element; symbol Se; at. no. 34; at. wt. 78.96; m.p. 217°C; b.p. about 685°C; sp. gr. 4.81 at 20°C; valence -2, +4, or +6. Selenium is directly below sulfur in Group 16 of the periodic table. In chemical activity and physical pro...
    Found on http://www.infoplease.com/ce6/sci/A08443
    
    
17. Selenium
    Selenium is a rare metal element with the symbol Se. It was discovered in 1817 by Berzelius in the refuse of a sulphuric acid manufactory in Sweden.
    Found on http://www.probertencyclopaedia.com/brow
    
    
18. selenium
    (Se) Type: Term Pronunciation: sĕ-lē′nē-ŭm Definitions: 1. A metallic element chemically similar to sulfur, atomic no. 34, atomic wt. 78.96; an essential trace element toxic in large quantities that is required for glutathione peroxidase and a few other enzymes; 75Se...
    Found on http://www.medilexicon.com/medicaldictio
    
    
19. selenium
    Grey, non-metallic element, atomic number 34, relative atomic mass 78.96. It belongs to the sulphur group and occurs in several allotropic forms that differ in their physical and chemical properties. It is an essential trace element in human nutrition. Obtained from many sulphide ores and selenides, it is used as a red colouring for glass and e...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
20. Selenium
    Selenium is an essential micronutrient in the human diet that functions as a component of enzymes involved in antioxidant protection and thyroid hormone metabolism. In combination with vitamin E, it exerts antioxidant effects that help keep the immune system strong. However excessive use of selenium...
    Found on http://savingmyhair.com/component/conten
    
    
21. selenium
    A mineral that is needed by the body to stay healthy. It is being studied in the prevention and treatment of some types of cancer. Selenium is a type of antioxidant.
    Found on http://www.cancer.gov/dictionary?expand=
    
    
22. Selenium
    (software) `Selenium` is a portable software testing framework for web applications. Selenium provides a record/playback tool for authoring tests without learning a test scripting language. Selenium provides a test domain specific language (DSL) to write tests in a number of popular programmi...
    Found on http://en.wikipedia.org/wiki/Selenium