an extract prepared, not from one, but several bodies mixed together; and, among the moderns, the term is applied to several extracts procured from the same body, and then mixed together. Thus, if from wormwood we draw the water, spirit, oil, salt, and tincture, and according to the rules of art re-unite these into a mass compounded of them all, and containing the joint virtues of all, we have a clyssus of wormwood.