1. hygroscopic - Adjective
2. hygroscopic - Adjective Satellite
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 dictionaryArsenic 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. Source: Internet
Another problem is the hygroscopic nature of the crystal itself: it absorbs moisture from the air and may dissolve. Source: Internet
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. Source: Internet
Clouds of all types require minute hygroscopic particles upon which water vapor can condense. Source: Internet
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. Source: Internet
In addition, ammonium nitrate is hygroscopic, susceptible to damp, hence the above concerns. Source: Internet