Look up: boron

1. boron
   (B) Type: Term Pronunciation: bōr′on Definitions: 1. A nonmetallic trivalent element, atomic no. 5, atomic wt. 10.811; occurs as a hard crystalline mass or as a brown powder; forms borates and boric acid.
   Found on http://www.medilexicon.com/medicaldictio
   
   
2. boron
   [n] - a trivalent metalloid element
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. Boron
   Boron is a non-metallic element which occurs in several allotropes. It is rarely found in nature, normally occurring as borates or orthoboric acid. Hard yellow crystals or brown amorphous powder. Amorphous boron is the more common allotrope and exists as a dark powder which is unreactive towards wat...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
4. boron
   (B) B. Element 5, atomic weight 10.811. Hard yellow crystals or brown amorphous powder, used as a neutron absorber in nuclear chemistry and as a hardener in alloys.
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5. Boron
   CAS Number: 7440-42-8. A metalloid element used in metallurgy and in composite structural materials. Chemical symbol = B. Molecular weight = 10.811 g/mol.
   Found on http://www.chemicalglossary.net/definiti
   
   
6. boron
   a non-metallic element used as an acceptor impurity in silicon Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
7. Boron
   Bo'ron (bō'rŏn) noun [ See Borax .] (Chemistry) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a ...
   Found on http://www.encyclo.co.uk/webster/B/82
   
   
8. boron
   <chemistry, element> Fifth element (Z=5) in the periodic table, has 5 protons, potential use as an aneutronic fuel. Also useful as a neutron-absorber. ... Abbreviation: B ... (13 Nov 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
9. boron
   B noun a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder
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10. boron
    (B) (bor´on) a chemical element, atomic number 5, atomic weight 10.811.
    Found on http://www.encyclo.co.uk/local/21001
    
    
11. Boron
    • (n.) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a deep olive color, in a semimetallic form, and in colorless quadratic crystals similar to the diamond in hard...
    Found on http://thinkexist.com/dictionary/meaning
    
    
12. boron
    chemical element, semimetal of main Group IIIa (boron group) of the periodic table, essential to plant growth and of wide industrial application.[13 related articles]
    Found on http://www.britannica.com/eb/a-z/b/95
    
    
13. Boron
    Boron is British slang for a bore who knows everything about nothing.
    Found on http://www.probertencyclopaedia.com/brow
    
    
14. boron
    boron (bōr'on) [New Gr. from borax], chemical element; symbol B; at. no. 5; at. wt. 10.81; m.p. about 2,300°C; sublimation point about 2,550°C; sp. gr. 2.3 at 25°C; valence +3. Boron is a nonmetallic element existing as a dark brown to black amorphous powder or as an extremely ...
    Found on http://www.infoplease.com/ce6/sci/A08083
    
    
15. Boron
    Boron is British slang for a bore who knows everything about nothing.
    Found on http://www.probertencyclopaedia.com/brow
    
    
16. Boron
    Boron is a trivalent metalloid element found in nature only in combination, often in borates or silicates (such as in borax). Boron is used in metallurgy and nucleonics, being very important in nuclear reactors. It has the symbol B and is a dark brown or green amorphous powder, which stains the skin...
    Found on http://www.probertencyclopaedia.com/brow
    
    
17. boron
    Non-metallic element, atomic number 5, relative atomic mass 10.811. In nature it is found only in compounds, as with sodium and oxygen in borax. It exists in two allotropic forms (see allotropy): brown amorphous powder and very hard, brilliant crystals. Its compounds are used in the preparation of boric acid, water softeners, soaps, enamels...
    Found on http://www.talktalk.co.uk/reference/ency
    
    
18. Boron
    ) is the chemical element with atomic number 5 and the chemical symbol&nbsp;`B`. Boron is a metalloid. Because boron is not produced by stellar nucleosynthesis, it is a low-abundance element in both the solar system and the Earth`s crust. However, boron is concentrated on Earth by the water-solu...
    Found on http://en.wikipedia.org/wiki/Boron