Main Entry: ca·sein

Pronunciation: \ˈkā-ˌsēn, kā-ˈ\

Function: noun

Etymology: probably from French caséine, from Latin caseus cheese

Date: 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