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vapor US English

A substance diffused or suspended in the air, especially one normally liquid or solid

vapor US Thesaurus

bluish vapor rose from the basement window

vapor lock US English

An interruption in the flow of a liquid through a fuel line or other pipe as a result of vaporization of the liquid

vapor trail US English

Another term for contrail.

vapor barrier US English

A thin layer of impermeable material, typically polyethylene sheeting, included in building construction to prevent moisture from damaging the fabric of the building

vapor density US English

The density of a particular gas or vapor relative to that of hydrogen at the same pressure and temperature

vapor pressure US English

The pressure of a vapor in contact with its liquid or solid form

mercury vapor lamp US English

A lamp in which light is produced by an electrical discharge through mercury vapor

sodium-vapor lamp US English

A lamp in which an electrical discharge in sodium vapor gives a yellow light, typically used in street lighting

vapour trail US English

A trail of condensed water from an aircraft or rocket at high altitude, seen as a white streak against the sky