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Noun
/ˈäksəjən/,
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A colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Oxygen forms about 20 percent of the earth's atmosphere, and is the most abundant element in the earth's crust, mainly in the form of oxides, silicates, and carbonates,
  1. A colorless, odorless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Oxygen forms about 20 percent of the earth's atmosphere, and is the most abundant element in the earth's crust, mainly in the form of oxides, silicates, and carbonates


  1. 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
  2. Oxygen (from the Greek roots ὀξύς (oxys) (acid, literally "sharp", from the sour taste of acids) and -γενής (genēs) (producer, literally begetter)) is the element with atomic number 8 and represented by the symbol O. ...
  3. Oxygen is Avalon's fourth studio album, released on May 22, 2001 and produced by Brown Bannister and Grant Cunningham. The project was strongly supported by Christian radio, containing six No. 1 radio singles—the most of any Avalon album to date (see below). ...
  4. Oxygen is 1999 film, directed and written by Richard Shepard. The film follows a troubled and (unbeknownst to her husband) masochistic cop, Madeline Foster (played by Maura Tierney) as she pursues a kidnapper who calls himself Harry Houdini (Adrien Brody). ...
  5. The Oxygen Project is a project created to give a visual refresh to KDE SC 4, the current release of KDE. The original purpose was to create a new set of icons but expanded to include a new theme, which included a new cursor, widget and window theme, and sounds. ...
  6. "Oxygen" is the third single by Swedish pop music singer Marie Serneholt released from her debut album Enjoy the Ride in 2006.
  7. Oxygen is a futuristic Christian novel by John B. Olson and Randall S. Ingermanson
  8. A chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994; Molecular oxygen (O2), a colorless, odorless gas at room temperature; A mixture of oxygen and other gases, administered to a patient to help him or her to breathe; An atom of this element
  9. Many cosmetic products contain antioxidants, ingredients that reduce the negative effect of oxygen or oxidative substances on skin. ...
  10. A gas known for its colorless, odorless properties and its crucial role in the respiratory process of living organisms. Used by divers in varying concentrations as part of the breathing gas mixture. Occurs in air at approximately 21% by volume. ...
  11. A gaseous non-metallic element. It makes up approximately 21% of the atmosphere.
  12. Often seen as using the chemistry abbreviation 02, gas vital for all life on this planet; makes up about 21% of the air by volume.
  13. Colorless odorless gas that makes up about 20 percent of the air we breathe; it is essential to life because it is used for the chemical reactions that occur in the cells of the body.
  14. A gas that exists naturally in the atmosphere and is produced by plants during photosynthesis that humans and other animals breathe.
  15. An element that is very abundant throughout the universe. Earth's atmosphere is about 20% oxygen. All animal life on Earth must breathe oxygen to survive.
  16. 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".
  17. A gas that all animals need to live. Some animals have lungs to get oxygen from the air, others have gills to get oxygen from water.
  18. O2, is found on Earth as a gas and constitutes about 20.8% 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. ...
  19. A non-metal – symbol O, atomic number 8. Oxygen is a gas found in the air. It is needed for aerobic respiration in cells.
  20. An element active in physiological processes and crucial to brain functioning.
  21. A chemical element consisting of eight protons, eight neutrons and eight electrons. Two hydrogen atoms combine with one oxygen atom to form a molecule of water.
  22. A sub-section of Physical Data, on the Advanced tab. See Oxygen in the User Guide for more information.
  23. A colorless, tasteless, odorless, gaseous element. It makes up 21% of the air we breathe and is found in water, in most rocks and minerals, and in many organic compounds. It is an important component of bioluminescence.
  24. (chemical symbol O, atomic number 8) is the second most common element on Earth and the third most common element in the universe. ...
  25. (O2) - colorless, odorless gas essential for all life processes; the most important component of air.  See Hypoxemia for symptoms of insufficient oxygenation