CASEIN

[ca.sein] n [prob. fr. F caseine, fr. L caseus] (1841): a phosphoprotein of milk: as a: one that is precipitated from milk by heating with an acid or by the action of lactic acid in souring and is used in making paints and adhesives b: one that is produced when milk is curdled by rennet, is the chief constituent of cheese, and is used in making plastics