Vapor
A gas, particularly one near to equilibrium with the liquid phase of the substance and which does not follow the gas laws. Usually used instead of gas for a refrigerant, and, in general, for any gas below the critical temperature.
When a liquid changes to a gaseous form. The ability of the gas to hold moisture will reduce as temperatures reduce; more moisture can be contained in the gas as the temperatures increase.
The gaseous state of a fluid that normally exists as a liquid under atmospheric conditions, i.e. a gas whose temperature is below its critical temperature.