Look up: helium

1. helium
   The second lightest and second most abundant element. The typical helium atom consists of a nucleus of two protons and two neutrons surrounded by two electrons. Helium was first discovered in our Sun. Roughly 25 percent of our Sun is helium.
   Found on http://antwrp.gsfc.nasa.gov/apod/lib/glo
   
   
2. helium
   [n] - a very light colorless element that is one of the six inert gasses
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. Helium
   Lighter than air gas, element He.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
4. Helium
   At room temperature, helium is a colourless and odourless gas. After hydrogen, it is the chemical element with the lowest density and has the lowest melting point of all elements. As with all other noble gases (neon, argon, krypton, xenon) helium is very inert. Therefore there are no known helium co...
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5. Helium
   An inert gaseous element. The atom is characterised by possessing two protons in its nucleus. Usually there two neutrons as well. This abundant form of helium is about four times as heavy as hydrogen. Helium accounts for just under one quarter of the atomic matter in the universe and was principally...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
6. Helium
   Discovered : by Sir William Ramsay in London, and independently by P.T. Cleve and N.A. Langlet in Uppsala, Sweden in 1895Origin : The name is derived from the Greek ‘helios`,sunDescription :A colourless, odourless gas that is totally unreactive. It is extracted from natural gas wells, some of ...
   Found on http://www.allchemicals.info/index/actio
   
   
7. helium
   He. Element 2, atomic weight 4.0026. A colorless, odorless, inert gas, first discovered in the emission spectrum of the sun in 1868.
   Found on http://antoine.frostburg.edu/chem/senese
   
   
8. Helium
   An inert colourless gas, one-sevcnth of the weight of air. It is preferable to hydrogen for use in airships because it is non-inflammable. Unfortunately it is very costly and is only found in workable quantities in North America, and it is twice as heavy as hydrogen.
   Found on http://www.aeroplanemonthly.com/glossary
   
   
9. helium
   it is used in high-pressure gas systems in rockets and for inflating balloons and airships. Category: Chemistry • chemical element:atomic number 2 Category: Chemistry
   Found on http://www.mijnwoordenboek.nl/definition
   
   
10. Helium
    He'li·um noun [ New Latin , from Greek ... the sun.] (Chemistry) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals.
    Found on http://www.encyclo.co.uk/webster/H/28
    
    
11. Helium
    He'li·um (hē'lĭ*ŭm) noun [ New Latin , from Greek 'h`lios the sun.] (Chemistry) An inert, monoatomic, gaseous element occurring in the atmosphere of the sun and stars, and in small quantities in the earth's atmospher...
    Found on http://www.encyclo.co.uk/webster/H/28
    
    
12. helium
    <element> A gas. Certain types of radiation therapy used charged, radioactive particles of helium. ... (16 Dec 1997) ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
13. helium
    (He) (he´le-әm) a chemical element, atomic number 2, atomic weight 4.003. It is a chemically inert element that is odorless, tasteless, and noncombustible.
    Found on http://www.encyclo.co.uk/local/21001
    
    
14. Helium
    • (n.) A gaseous element found in the atmospheres of the sun and earth and in some rare minerals. • (n.) An inert, monoatomic, gaseous element occurring in the atmosphere of the sun and stars, and in small quantities in the earth`s atmosphere, in several minerals and in certain mineral wat...
    Found on http://thinkexist.com/dictionary/meaning
    
    
15. Helium
    (from the article `Keesom, Willem Hendrik`) ...joined the faculty of the Utrecht veterinary school. Six years later he returned to Leiden as professor of experimental physics. At the Onnes ...
    Found on http://www.britannica.com/eb/a-z/h/33
    
    
16. helium
    chemical element, inert gas of Group 0 (noble gases) of the periodic table. The second lightest element (only hydrogen is lighter), helium is a ... [53 related articles]
    Found on http://www.britannica.com/eb/a-z/h/33
    
    
17. helium
    (He) Type: Term Pronunciation: hē′lē-ŭm Definitions: 1. A gaseous element present in minute amounts in the atmosphere (0.000524% of dry volume); atomic no. 2, atomic wt. 4.002602; used as a diluent of medicinal gases; used as a diluent of oxygen principally in nonmedical ...
    Found on http://www.medilexicon.com/medicaldictio
    
    
18. helium
    helium (hē'lēum) , gaseous chemical element; symbol He; at. no. 2; at. wt. 4.0026; m.p. below -272°C at 26 atmospheres pressure; b.p. -268.934°C at 1 atmosphere pressure; density 0.1785 grams per liter at STP; valence usually 0.Spectroscopic evidence for the presence of heliu...
    Found on http://www.infoplease.com/ce6/sci/A08232
    
    
19. Helium
    Helium is a gaseous element of the noble gas group with the symbol He.
    Found on http://www.probertencyclopaedia.com/brow
    
    
20. helium
    Colourless, odourless, gaseous, non-metallic element, atomic number 2, relative atomic mass 4.0026. It is grouped with the noble gases (rare gases) in Group 0 of the periodic table. Helium is nonreactive because of its full outer shell of electrons and forms no compounds. It is the second most abundant element (after hydrogen) in the universe, ...
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21. helium
    a gas that's lighter-than-air.
    Found on http://www.kidseclipse.com/pages/glossar
    
    
22. Helium
    Helium (symbol He) is a colorless, odorless, tasteless chemical element, one of the nearly inert noble gases of the periodic table of elements. Its boiling and melting points are the lowest among the elements; except in extreme conditions, it exists only as a gas. At extremely low temperatures, it i...
    Found on http://www.chemistry-dictionary.com/defi
    
    
23. Helium
    `Helium` ( ) is the chemical element with atomic number 2 and an atomic weight of 4.002602, which is represented by the symbol `He`. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Its boiling and melting points are the lo...
    Found on http://en.wikipedia.org/wiki/Helium
    
    
24. Helium
    (band) `Helium` was an American alternative rock band formed in the summer of 1992. Originally calling themselves "Chupa", its founding members were Mary Lou Lord, Jason Hatfield (Juliana`s brother), Shawn King Devlin (drums) and Brian Dunton (electric bass guitar). Devlin and Dunto...
    Found on http://en.wikipedia.org/wiki/Helium
    
    
25. Helium
    (Haskell) `Helium` is a compiler and a dialect of the functional programming language Haskell. It has been designed to make learning Haskell easier by giving clearer error messages. It is being developed at Utrecht University, Netherlands, primarily by Arjan van IJzendoorn, Daan Leijen, Basti...
    Found on http://en.wikipedia.org/wiki/Helium