oxygen definition

  • noun:
    • A nonmetallic factor constituting 21 per cent regarding the atmosphere by amount occurring as a diatomic gas, O2, and in many substances such liquid and iron ore. It combines with most elements, is vital for plant and pet respiration, and it is necessary for nearly all combustion. Atomic no. 8; atomic fat 15.9994; melting point -218.4°C; boiling-point -183.0°C; gasoline density at 0°C 1.429 grams per liter; valence 2. See Table at element.
    • A chemical element (representation O) with an atomic quantity of 8 and general atomic mass of 15.9994.
    • Molecular air (O2), a colorless, odorless gasoline at room temperature.
    • A mixture of air as well as other gases, administered to someone to simply help him or her to breathe.
    • An atom for this factor.
    • A colorless, tasteless, odorless, gaseous element of atomic number 8, happening in no-cost condition inside environment, that it types about 23 % by fat and about 21 % by volume, being slightly more substantial than nitrogen. Logo O. Atomic weight 15.9994.
    • Chlorine utilized in bleaching.
    • Chemical logo, O; atomic fat, 16. A feature found by Priestley in 1774, who called it dephlogisticated atmosphere.
    • A manufacturers' name for bleaching-powder.
    • a nonmetallic bivalent factor which are a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 % of this atmosphere by amount; the essential plentiful aspect in our planet's crust

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