oxygen

Definition of Oxygen in English :

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

WordNet Lexical Database for English. Princeton University. 2010.

Oxygen

see synonyms of oxygen

noun

a.

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

b.

(as modifier)

an oxygen mask

Oxygen

see synonyms of oxygen

noun

a colorless, odorless, tasteless, gaseous chemical element that occurs free in the atmosphere, forming one fifth of its volume, and in combination in water, sandstone, limestone, etc.: it is very active, combines with nearly all other elements, is the most common element in the earth's crust, and is essential to life processes and to combustion: symbol, O; at. no., 8

see the periodic table of elements in the Reference Supplement

Oxygen

see synonyms of oxygen

n. Symbol O

A nonmetallic element constituting 21 percent of the atmosphere by volume that occurs as a diatomic gas, O₂, and in many compounds such as water and silica, and in iron ore. It combines with most elements, is essential for plant and animal respiration, and is required for nearly all combustion. Ozone, O₃, is an allotrope of this element. Atomic number 8; atomic weight 15.9994; melting point -218.79°C; boiling point -182.9°C; gas density at 0°C 1.429 grams per liter; valence 2. See Periodic Table.

Oxygen

Noun

Oxygen

Oxygen

Oxygen

WORD OF THE DAY

lea

Recent Searches