relative humidity


relative humidity
the amount of water vapor in the air, expressed as a percentage of the maximum amount that the air could hold at the given temperature; the ratio of the actual water vapor pressure to the saturation vapor pressure. Abbr.: RH, rh Also called humidity. Cf. absolute humidity, dew point, mixing ratio, specific humidity.
[1810-20]

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      ratio of the actual vapour pressure of water in the air to that in air saturated with water vapour; it is often expressed as a percentage. See humidity.

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Universalium. 2010.

Look at other dictionaries:

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