Pharmacology. a liquid, usually aqueous or sometimes alcoholic preparation containing insoluble material in the form of a suspension or emulsion, intended for external application without rubbing, in such skin conditions as itching, infection, allergy, pain, or the like.
a liquid cosmetic, usually containing agents for soothing or softening the skin, especially that of the face or hands.
Origin: 1350–1400;Middle Englishlocion < Latinlōtiōn- (stem of lōtiō) a washing. See lotic, -ion