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.
Abbreviation: RH, rh.
the mass of water vapour present in the air expressed as a percentage of the mass that would be present in an equal volume of saturated air at the same temperature Compare absolute humidity
relative humidity n.
The ratio of the amount of water vapor in the air at a specific temperature to the maximum amount that the air could hold at that temperature, expressed as a percentage.
The ratio of the actual amount of water vapor present in a volume of air at a given temperature to the maximum amount that the air could hold at that temperature, expressed as a percentage. Warm air can hold more water vapor than cool air, so a particular amount of water vapor will yield a lower relative humidity in warm air than it does in cool air. Compare absolute humidity.
noun, Law. 1. a fact or circumstance that disqualifies from lawful marriage persons who are closely related.
noun, Optics. 1. See under index of refraction. index of refraction noun, Optics. 1. a number indicating the speed of light in a given medium as either the ratio of the speed of light in a vacuum to that in the given medium (absolute index of refraction) or the ratio of the speed of light […]
- Relative leukocytosis
relative leukocytosis n. An increased proportion of one or more types of white blood cells in the blood without an actual increase in the total number of white blood cells.
- Relative location
noun a point or place in relation to another point or place