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Definitions for Oxygen

[1] a colorless, odorless, gaseous element constituting about one-fifth of the volume of the atmosphere and present in a combined state in nature. It is the supporter of combustion in air and was the standard of atomic, combining, and molecular weights until 1961, when carbon 12 became the new standard. Symbol : O; atomic weight : 15.9994; atomic number : 8; density: 1.4290 g/l at 0°C and 760 mm pressure.
[2] a colourless odourless highly reactive gaseous element: the most abundant element in the earth's crust (49.2 per cent). It is essential for aerobic respiration and almost all combustion and is widely used in industry. Symbol: O; atomic no: 8; atomic wt: 15.9994; valency: 2; density: 1.429 kg/m³; melting pt: –218.79°C; boiling pt: –182.97°C (as modifier ) an oxygen mask

Words nearby Oxygen

oxychromatic, oxycodone, oxycodone hydrochloride, oxycontin, oxyesthesia, oxygen, oxygen acid, oxygen affinity hypoxia, oxygen bar, oxygen capacity, oxygen consumption

Origin of Oxygen

1780–90; < French oxygène, equivalent to oxy- oxy-1 + -gène -gen

Other words from Oxygen

ox·y·gen·ic [ok-si-jen -ik] /ˌɒk sɪˈdʒɛn ɪk/ , ox·yg·e·nous [ok-sij -uh -nuh  s] /ɒkˈsɪdʒ ə nəs/ , adjective
ox·y·gen·ic·i·ty [ok-si-juh -nis -i-tee] /ˌɒk sɪ dʒəˈnɪs ɪ ti/ , noun