
1) Hygrometer
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https://www.crosswordclues.com/clue/psychrometer

An instrument used for measuring the water vapor content of the atmosphere; a type of hygrometer. It consists of two thermometers, one of which (the dry bulb) is an ordinary glass thermometer, while the other (wet bulb) has its bulb covered with a jacket of clean muslin which is saturated with distilled water prior to an observation. When the bulbs...
Found on
http://nsidc.org/arcticmet/glossary/psychrometer.html

instrument for measuring air moisture or temperature
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http://phrontistery.info/p.html

• (n.) An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer.
Found on
http://thinkexist.com/dictionary/meaning/psychrometer/

An instrument used to measure water vapor content of the atmosphere. It consists of two thermometers, a wet bulb and dry bulb. May also be referred to as a sling psychrometer.
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http://www.avon-weather.com/glossary.html

a hygrometer composed of two similar thermometers. The bulb of one thermometer is kept wet (by means of a thin, wet cloth wick) so that the cooling ... [1 related articles]
Found on
http://www.britannica.com/eb/a-z/p/128

An instrument used for measuring the water vapor content of the atmosphere; a type of hygrometer. It consists of two thermometers, one of which (the dry bulb) is an ordinary glass thermometer, while the other (wet bulb) has its bulb covered with a jacket of clean muslin which is saturated with disti...
Found on
http://www.daviddarling.info/encyclopedia/P/AE_psychrometer.html

An instrument for measuring relative humidity by means of wet and dry-bulb temperatures.
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http://www.electromn.com/glossary/p.htm

An instrument for measuring atmospheric humidity utilizing a dry and wet-bulb thermometer and whirled manually or by motorized unit to provide the moderate air flow necessary to obtain an aspirated wet-bulb temperature reading.
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http://www.encyclo.co.uk/local/20474

(si-krom´ә-tәr) an instrument for measuring the moisture of the atmosphere.
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http://www.encyclo.co.uk/local/21001

An instrument used for measuring the water vapor content of the atmosphere. It consists of two thermometers, one of which is an ordinary glass thermometer, while the other has its bulb covered with a jacket of clean muslin which is saturated with distilled water prior to use.
Found on
http://www.encyclo.co.uk/local/22268
Psy·chrom'e·ter noun [ Greek
psychro`s cold +
-meter : confer French
psychromètre .] An instrument for measuring the tension of the aqueous vapor in the atmosphere, being essentially a wet and dry bulb hygrometer.
Found on
http://www.encyclo.co.uk/webster/P/188

Type: Term Pronunciation: sī-krom′ĕ-tĕr Definitions: 1. A device for measuring the humidity of the atmosphere by the difference in temperature between two thermometers, the bulb of one kept moist, the other dry. Evaporation from the moist bulb lowers the reading of that thermometer; the greater the difference in readings, the d...
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http://www.medilexicon.com/medicaldictionary.php?t=73770

An instrument that measures relative humidity of the air.
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http://www.metcheck.com/OTHER/glossary.asp

Instrument used to measure atmospheric humidity. It consists of two thermometers (wet-bulb and a dry-bulb) one of which has its bulb covered by a moistened wick. Humidity is determined by the difference in readings between the two thermometers after air has passed over both of them for a specific time period.
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http://www.physicalgeography.net/physgeoglos/p.html

[
n] - a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer
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http://www.webdictionary.co.uk/definition.php?query=psychrometer

psychrometer A device for measuring the humidity of the atmosphere by the difference in temperature between two thermometers, the bulb of one kept moist, the other dry. Evaporation from the moist bulb lowers the reading of that thermometer; the greater the difference in readings, the drier the air; no difference indicates 100% relative humidity.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1777/

an instrument used for measuring the water vapor content of the atmosphere; a type of hygrometer ; it consists of two thermometers, one of which (the dry bulb) is an ordinary glass thermometer , while the other (wet bulb) has its bulb covered with a jacket of clean muslin which is saturated with distilled water prior to an observation ; when the bu...
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https://nsidc.org/cryosphere/glossary?page=20

An instrument used to determine the dry and wet bulb temperature of air simultaneously.
Found on
https://www.encyclo.co.uk/local/20687
noun a hygrometer consisting of a dry-bulb thermometer and a wet-bulb thermometer; their difference indicates the dryness of the surrounding air
Found on
https://www.encyclo.co.uk/local/20974

An instrument used to measure water vapour content of the atmosphere. A common type consists of two liquid-in-glass thermometers, one a dry bulb and another, with a muslin sock over the tip which is saturated with water, called the wet bulb. The thermometers are ventilated to cause evaporation off the wet bulb thermometer. The atmospheric humidity ...
Found on
https://www.encyclo.co.uk/local/21131

An instrument for measuring relative humidity by means of wet and dry-bulb temperatures.
Found on
https://www.encyclo.co.uk/local/22819

an instrument for determining atmospheric humidity by the reading of two thermometers, the bulb of one being kept moist and ventilated.
Found on
https://www.infoplease.com/dictionary/psychrometer
No exact match found.