n.
n. [ Pref. de- + L. lactare to suck milk, from lac milk. ] The act of weaning. [ Obs. ] Bailey. [ 1913 Webster ]
n. The secretion and yielding of milk by the mammary gland; giving suck. [ 1913 Webster ]
n. (Med.) Defective flow or vitiated condition of the milk. [ 1913 Webster ]