an amorphous, gelatinous substance containing nitrogen, found in milk and other animal fluids. it resembles peptone, and is variously regarded as a coagulating or emulsifying agent.-a white waxy substance found in the sap of the south american cow tree (galactodendron).-an amorphous, gummy carbohydrate resembling gelose, found in the seeds of leguminous plants, and yielding on decomposition several sugars, including galactose.