relative humidity

(redirected from Relative air humidity)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to Relative air humidity: absolute humidity, Specific 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.

relative humidity

n
(General Physics) 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

rel′ative humid′ity


n.
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.
[1810–20]

rel·a·tive humidity

(rĕl′ə-tĭv)
The ratio of the actual amount of water vapor present in the air at a given temperature to the maximum amount that the air could hold at that temperature. Relative humidity is expressed as a percentage. Compare absolute humidity.

relative humidity

A percentage scale to measure the level of humidity in the atmosphere: from 0% which indicates the air is absolutely dry to 100% which indicates the air is saturated.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.relative humidity - the ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperaturerelative humidity - the ratio of the amount of water in the air at a give temperature to the maximum amount it could hold at that temperature; expressed as a percentage
ratio - the relative magnitudes of two quantities (usually expressed as a quotient)
References in periodicals archive ?
The hygroscopicity tests were performed in a biochemical oxygen demand (BOD) incubating chamber with temperature and relative air humidity control.
Seed lots were kept in multi-layered Kraft paper containers and stored in a cold chamber at 10[degrees]C and 60% relative air humidity during the experimental period.
In experiments with broilers, increased levels of relative air humidity resulted in increased litter moisture and caking, as well as increased ammonia levels (Weaver and Meijerhof, 1991).
Description : Multiplication of breeding material; 5000 sqm divided in 10 compartments with possibility of control for climatic factors (temperature, relative air humidity, light) for breeding and plant protection purposes
It was assumed to maintain the indoor air temperature of 12[degrees]C and relative air humidity of 40% in the hall.
Prior to and during training the daily measurements of air temperature, relative air humidity, air pressure, horse's body temperature, respiration rate and heart rate were performed.
The best model that accounts in addition to organizational and social factors, only a relative air humidity and temperature has been confirmed in a prospective study in 2011, describes 90% of the variability of admissions to hospital, where the weather accounts for 20% of the variation
3]/h), relative air humidity (percents), air temperature ([degrees]C), air velocity (m/s), surface area to volume ratio (1/m), noise isolation (dB), annual heat requirement (kWh/[m.
The consistency of the drying system is based on the reduction of the moisture from the product and of the temperature of the used air, and on the increase of the absolute humidity of that air and of the temperature of the product, never allowing values of the relative air humidity to be greater than 100%.
The following environmental variables were measured for each of the quadrats in a plot: litter depth, atmospheric temperature (maximum, average and minimum), soil temperature, relative air humidity (maximum, average and minimum), luminosity, canopy closure, litter moisture (leaf and branch), number of individuals and morphotypes of herbaceous plants up to 50 cm height, number of individuals and morphotypes of individuals of herbaceous plants up to 50 cm height (Menez, 2002).
Correlation between relative air humidity and carbon dioxide emissions was poor, while the correlation coefficient of the measurement was -0.
Then operative temperature can be accepted as the criterion of hygrothermal microclimate from the point of human physiology in an overwhelming number of cases: just in the area of low and high relative air humidity enthalpy needs to be considered (see the section, "The Influence of Humidity").