Source : Webster's Revised Unabridged Dictionary (1913)

Galactin \Ga*lac"tin\, n. [Gr. ?, ?, milk. Cf. {Lactin}.]
   (Chem.)
      (a) 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.
      (b) A white waxy substance found in the sap of the South
          American cow tree ({Galactodendron}).
      (c) An amorphous, gummy carbohydrate resembling gelose,
          found in the seeds of leguminous plants, and yielding
          on decomposition several sugars, including galactose.