hygroscopic
Speech parts
1. hygroscopic - Adjective
2. hygroscopic - Adjective Satellite
Meaning
Of or pertaining to, or indicated by, the hygroscope; not readily manifest to the senses, but capable of detection by the hygroscope; as, glass is often covered with a film of hygroscopic moisture.
Having the property of readily inbibing moisture from the atmosphere, or of the becoming coated with a thin film of moisture, as glass, etc.
Source: Webster's dictionarySynonyms
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Examples
Arsenic forms colorless, odorless, crystalline oxides As 2 O 3 (" white arsenic ") and As 2 O 5 which are hygroscopic and readily soluble in water to form acidic solutions.
Another problem is the hygroscopic nature of the crystal itself: it absorbs moisture from the air and may dissolve.
Black powder made with less-expensive and more plentiful sodium nitrate (in appropriate proportions) works just as well but is more hygroscopic than powders made from potassium nitrate—popularly known as saltpeter.
Clouds of all types require minute hygroscopic particles upon which water vapor can condense.
In addition to being a nuisance, the residue from burnt black powder is hygroscopic and with the addition of moisture absorbed from the air, this residue forms a caustic substance.
In addition, ammonium nitrate is hygroscopic, susceptible to damp, hence the above concerns.