Look up: Oxygen

1. 
   Oxygen
   Oxygen is an element that is found free as a colourless, odourless, tasteless gas in the atmosphere, of which it constitutes 21%. It is found in water, most rocksand minerals, and in numerous compounds; it is capable of combining with all of the elements, except for the inert gases; it is active in physiological processes and especially in combustive processes. It has the symbol O.
   Found on http://www.encyclo.co.uk/nol.php
   
   
2. 
   oxygen
   (Humans as organisms) gaseous element making up about 20% of the air, which is needed by living organisms for respiration
   Found on http://www.bbc.co.uk/schools/gcsebitesiz
   
   
3. 
   oxygen
   [n] - a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas
   Found on http://www.webdictionary.co.uk/definitio
   
   
4. 
   Oxygen
   Oxygen is a colourless, odourless gas. It is represented by the symbol O. It's most important property for use in industrial processes is that it supports combustion. Oxygen forms 21% by volume of the atmosphere. Oxygen has a relative density of 1.105.
   Found on http://www.bocindustrial.co.uk/bocindust
   
   
5. 
   Oxygen
   A colourless and odourless element that is essential for most life forms on earth. The name is derived from the French oxygène, which means 'acid generating'. Symbol O Also known as Vital air.Discovered1774 Priestley publishes his work on oxygen.AbundanceThe most abundant element on earth, making up about 1/5 of the earth's atmosphere and 8/9ths of...
   Found on http://www.diracdelta.co.uk/science/sour
   
   
6. 
   Oxygen
   O a common gaseous element, occurring naturally in the air, water, and most minerals and organic substances, essential to the reciprocal processes of plant and animal life. Highly reactive combining with other atoms, molecules and compounds through a process known as burning. Exists in the air as free molecules O2 (O3 = ozone), and also dissolv...
   Found on http://www.bio-power.co.uk/glossary.htm
   
   
7. 
   oxygen
   (O) Element 8, atomic weight 15.9994, a colorless, odorless gas that makes up about 1/5 of the earth's atmosphere and (in combined form) 8/9ths of earth's oceans and almost half of the earth's crust. The name is derived from the French oxygène, which means 'acid generating'.
   Found on http://antoine.frostburg.edu/chem/senese
   
   
8. 
   Oxygen
   A gaseous element which makes up approximately 20% of the earths atmosphere. It is usually found in the molecular ... form. Oxygen is the most abundant element on earth
   Found on http://www.fire.org.uk/glossary.htm
   
   
9. 
   Oxygen
   Gas that makes up one fifth of the air we breathe. Oxygen is essential for life.
   Found on http://www.cancerhelp.org.uk/glossary.as
   
   
10. 
    Oxygen
    A gas in the air used in aerobic respiration and produced in photosynthesis
    Found on http://www.makingsenseofhealth.org.uk/de
    
    
11. 
    Oxygen
    a gas that is colourless, odourless, and tasteless; essential to almost all forms of life
    Found on http://www.medichecks.com/glossary.cfm?l
    
    
12. 
    Oxygen
    Oxygen is an odourless, colourless gas that makes up about 20% of the air we breathe.
    Found on http://www.nhsdirect.nhs.uk/glossary/
    
    
13. 
    Oxygen
    Oxygen: A colorless, odorless and tasteless gas that makes up about 20% of the air we breathe (and at least half the weight of the entire solid crust of the earth) and which combines with most of the other elements to form oxides. Oxygen is essential to human, animal and plant life. The chemical symbol for the element oxygen is O. As a medicinal ga ...
    Found on http://www.medterms.com/script/main/art.
    
    
14. 
    oxygen
    chemical element:atomic number 8 Category: Chemistry
    Found on http://www.mijnwoordenboek.nl/definition
    
    
15. 
    Oxygen
    Ox'y·gen noun [ French oxygène , from Greek ............ sharp, acid + root of ............ to be born. So called because originally supposed to be an essential part of every acid .] 1. (Chemistry) A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, be ...
    Found on http://www.encyclo.co.uk/webster/O/62
    
    
16. 
    oxygen
    1. <chemistry> A colourless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.96. ... It occurs combined in immense quantities, forming eight ninths by weight of wate ...
    Found on http://www.mondofacto.com/facts/dictiona
    
    
17. 
    oxygen
    O noun a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth`s crust
    Found on http://wordnet.princeton.edu/perl/webwn?
    
    
18. 
    Oxygen
    `Oxygen ` is a colorless, odorless, tasteless, gaseous chemical element with the chemical symbol `O` and atomic number 8. It is a chalcogen, period 2, nonmetallic element that can form binary compounds (known as oxides) with almost all the other elements. The valency of oxygen is 2 and the most common oxidation state is -2. the most abundant element by mass in the Earth's crust, The name `oxygen` was coined in 1777 by Antoine Lavoisier from the ...
    Found on http://en.wikipedia.org/wiki/Oxygen
    
    
19. 
    oxygen
    (O) (ok´sĭ-jәn) a chemical element, atomic number 8, atomic weight 15.999. It is a colorless and odorless gas that makes up about 20 per cent of the atmosphere. In combination with hydrogen, it forms water; by weight, 90 per cent of water is oxygen. It is the third most abundant of all ...
    Found on http://www.mercksource.com/pp/us/cns/cns
    
    
20. 
    Oxygen
    • (n.) A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.96. • (n.) Chlorine used in bleaching.
    Found on http://thinkexist.com/dictionary/meaning
    
    
21. 
    oxygen
    nonmetallic chemical element of Group VIa of the periodic table. Oxygen is a colourless, odourless, tasteless gas, the most plentiful element in the ... [108 related articles]
    Found on http://www.britannica.com/eb/a-z/o/43
    
    
22. 
    oxygen
    oxygen A colorless, odorless, tasteless gas that is the most abundant element on earth, making up about 20% by volume of the atmosphere at sea level, about 50% of the material of the earth’s surface, and about 90% of water. Oxygen is necessary for the life processes of nearly all living organisms and for most forms of combustion. It readily forms compo...
    Found on http://www.wordinfo.info/words/index/inf
    
    
23. 
    OXYGEN
    A colorless, tasteless, odorless gas that is the second most abundant constituent of dry air, comprising 20.946%.
    Found on http://www.weather.com/glossary/o.html
    
    
24. 
    oxygen
    (O) Oxygen atom Credit: NASA/World Book A colorless, odorless, gaseous element, the most abundant in Earth's crust (49.2% by mass) and the second most abundant in the atmosphere (28% by volume). Free oxygen is essential to the survival of all aerobic organisms. Oxy...
    Found on http://www.daviddarling.info/encyclopedi
    
    
25. 
    oxygen
    A gaseous element that constitutes about 21 percent of the air we breathe. Elemental molecular oxygen consists of two oxygen atoms bonded together. A photochemical reaction of oxygen is (ultimately) responsible for the production of ozone in the stratosphere. Oxygen concentrations found in ice core ...
    Found on http://www.daviddarling.info/encyclopedi