percentage humidity

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• Humidity — is the amount of water vapor in the air. In daily language the term humidity is normally taken to mean relative humidity. Relative humidity is defined as the ratio of the partial pressure of water vapor in a parcel of air to the saturated vapor… …   Wikipedia

• humidity — Moisture or dampness, as of the air. [L. humiditas, dampness] absolute h. the mass of water vapor actually present per unit volume of gas or air. relative h. the actual amount of water vapor present in the air or in a gas, divided by the amount… …   Medical dictionary

• humidity — /hjuˈmɪdəti / (say hyooh miduhtee) noun 1. humid condition; dampness. 2. Meteorology a. the condition of the atmosphere with regard to its water vapour content. b. the ratio, expressed as a percentage, of the water vapour present in the… …  

• humidity, relative —    The ratio, expressed as a percentage, of the amount of water vapor actually present in air of a given temperature, as compared with the greatest possible amount of water vapor that could be present in air at that temperature. Calculation of… …   Lexicon of Cave and Karst Terminology

• 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… …   Universalium

• relative humidity —    The proportion of actual moisture in the air to the maximum amount possible at a specified temperature. It is stated as a percentage, with 100% being air fully saturated with water vapor. Control very important in art conservation because when …   Glossary of Art Terms

• temperature-humidity index — /tem peuhr euh cheuhr hyooh mid i tee/ or, often, / yooh , preuh , peuhr cheuhr , choor / a number representing an estimate of the effect of temperature and moisture on humans, computed by multiplying the sum of dry bulb and wet bulb temperature… …   Useful english dictionary

• relative humidity — n the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature compare ABSOLUTE HUMIDITY * * * the percentage of moisture in the air as compared to the amount necessary to cause… …   Medical dictionary

• relative humidity — n. the amount of moisture in the air as compared with the maximum amount that the air could contain at the same temperature, expressed as a percentage: cf. ABSOLUTE HUMIDITY …   English World dictionary

• relative humidity — noun The ratio of the actual amount of water vapor (absolute humidity) present in the air to the saturation point at the same temperature, usually expressed as a percentage …   Wiktionary

• relative humidity —   ratio of water vapour in the air compared to the maximum possible at that temperature and pressure, expressed as a percentage …   Geography glossary