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Reference.org
Moisture
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<p>Moisture is the presence of a liquid, especially water, often in trace amounts. Moisture is defined as water in the adsorbed or absorbed phase. Small amounts of water may be found, for example, in the air (<a href="/facts/Humidity/Nwb28VlT">humidity</a>), in foods, and in some commercial products. Moisture also refers to the amount of <a href="/facts/Water_vapor/DX5IUFG0">water vapor</a> present in the air. The soil also includes moisture. </p>