in the animal economy, is the dissolution of the aliment into such minute parts as are fit to enter the lacteal vessels, and circulate with the mass of blood. See Anatomy, no 102.

chemistry, is an operation which consists in exposing bodies to a gentle heat, in proper vessels, and during a certain time. This operation is very useful to favour the action of certain substances upon each other; as, for example, of well calcined, dry, fixed alkali upon rectified spirit of wine. When these two substances are digested together in a matrix, with a gentle sand-bath heat, the spirit of wine acquires a yellowish-red colour, and an alkaline quality. The spirit would not well acquire these qualities by a stronger and shorter heat.