
1) Form of water
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https://www.crosswordclues.com/clue/water-vapor

Water vapor or water vapour (see spelling differences), also aqueous vapor, is the gas phase of water.
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http://en.wikipedia.org/wiki/Glossary_of_fuel_cell_terms

Water vapor, or water vapour or aqueous vapor, is the gaseous phase of water. It is one state of water within the hydrosphere. Water vapor can be produced from the evaporation or boiling of liquid water or from the sublimation of ice. Unlike other forms of water, water vapor is invisible. Under typical atmospheric conditions, water vapor is contin...
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http://en.wikipedia.org/wiki/Water_vapor

Water substance in vapor (gaseous) form; one of the most important of all constituents of the atmosphere.
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http://nsidc.org/arcticmet/glossary/water_vapor.html

(F Vapeur d'eau, R vapori de apa) creates a pressure just like any other gas. Cold air has a relatively low vapor pressure, while warm air (with larger amounts of water vapor) has a greater pressure. The difference in pressure cause the vapor to penetrate building materials in the direction from high to low vapor pressure
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http://www.angelfire.com/biz/BuildingPathology/BldngPathGlsry.html

Moisture existing as a gas in air.
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http://www.encyclo.co.uk/local/20933

Water substance in vapor (gaseous) form; one of the most important of all constituents of the atmosphere.
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http://www.encyclo.co.uk/local/21292

Water substance in a gaseous state that comprises one of the most important of all the constituents of the atmosphere.
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http://www.encyclo.co.uk/local/22268

The most abundant greenhouse gas; it is the water present in the atmosphere in gaseous form. Water vapor is an important part of the natural greenhouse effect. While humans are not significantly increasing its concentration, it contributes to the enhanced greenhouse effect because the warming influence of greenhouse gases leads ...
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http://www.encyclo.co.uk/visitor-contributions.php

[
n] - water in a vaporous form diffused in the atmosphere but below boiling temperature
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http://www.webdictionary.co.uk/definition.php?query=water%20vapor

water substance in vapor (gaseous) form; one of the most important of all constituents of the atmosphere.
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https://nsidc.org/cryosphere/glossary?page=28

water in the form of gas
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https://sciencetrek.org/sciencetrek/topics/climate/glossary.cfm

water that has turned to a gas - steam
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https://sciencetrek.org/sciencetrek/topics/water/glossary.cfm

Water present in the atmosphere in gaseous form; the source of all forms of condensation and precipitation. Water vapor, clouds, and carbon dioxide are the main atmospheric components in the exchange of terrestrial radiation in the troposphere, serving as a regulator of planetary temperatures via the greenhouse effect. Approximately 50 percent of t...
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https://www.encyclo.co.uk/local/20128
water vapour noun water in a vaporous form diffused in the atmosphere but below boiling temperature
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https://www.encyclo.co.uk/local/20974

The most abundant greenhouse gas, it is the water present in the atmosphere in gaseous form. Water vapor is an important part of the natural greenhouse effect. While humans are not significantly increasing its concentration, it contributes to the enhanced greenhouse effect because the warming influence of greenhouse gases leads to a positive water ...
Found on
https://www.encyclo.co.uk/local/22831
No exact match found.