oxygen

UK /ˈɒksɪd͡ʒən/ US /ˈɑksɪd͡ʒən/
noun 5

Definitions

noun

1

The chemical element (symbol O) with an atomic number of 8 and relative atomic mass of 15.9994. It is a colorless and odorless gas. Sometimes called elemental oxygen to distinguish it from molecular oxygen.

Holonyms: dioxygen, O₂, oxygen (loose sense)

By molar fraction, calcium oxide contains equal parts calcium and oxygen.

2

Molecular oxygen (O₂), a colorless, odorless gas at room temperature.

Meronym: oxygen (strict sense)

About 21% of the air you breathe is oxygen.

3

A mixture of oxygen and other gases, administered to a patient to help them breathe.

4

An atom of this element.

Look first at any structure to see if there is a carbon with two oxygens attached. Hemiacetals, hemiketals, acetals, and ketals are all alike in that regard.

5

A condition or environment in which something can thrive.

Silence is the oxygen of shame.

They hoped to starve the terrorists of the oxygen of publicity.

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