liquid air

liquid air
noun
air in a liquid state (Freq. 3)
Hypernyms: ↑air, ↑cryogen

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noun
: air in the liquid state but usually richer in oxygen than gaseous air that is obtained as a faintly bluish transparent mobile intensely cold liquid by compressing purified air and cooling it by its own expansion to a temperature below the boiling points of its principal components nitrogen and oxygen and is used chiefly as a refrigerant and as a source of oxygen, nitrogen, and inert gases (as argon)

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a pale blue, intensely cold liquid, obtained by the compression and cooling of air: used as a source of oxygen, nitrogen, and inert gases, and as a refrigerant.
[1895-1900]

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liquid air,
an intensely cold, transparent liquid formed by putting air under very great pressure and then cooling it. It is used mainly as a refrigerant and as a source of nitrogen and oxygen.

Useful english dictionary. 2012.

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