noun a white waxy substance found in the sap of the south american cow tree (galactodendron).
2. galactin ·noun an amorphous, gummy carbohydrate resembling gelose, found in the seeds of leguminous plants, and yielding on decomposition several sugars, including galactose.
3. galactin ·noun 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.