The absorption of water from the atmosphere by a hygroscopic solid to such an extent that a concentrated solution of the solid eventually forms.
Chemistry
The absorption of water from the atmosphere by a hygroscopic solid to such an extent that a concentrated solution of the solid eventually forms.
Chemical Engineering
The absorption of moisture from the atmosphere by hygroscopic solids. The extent of the effect produces a concentrated liquid solution of that solid. Examples include sodium chlorate, sodium hydroxide, and calcium chloride.