1794 G. Pearson tr. L. B. Guyton de Morveau et al. Table Chem. Nomencl. §24 Lactates, compounds of Acid of Milk with different Bases.

1819 J. G. Children Ess. Chem. Anal. 317 Lactate of lead..; lactate of iron..; lactate of copper.

1890 J. Cagney tr. R. von Jaksch Clin. Diagnosis vi. 157 Crystals of lactate of lime occur in the discharges of children.

1889 in Cent. Dict.

1908 Arch. Middlesex Hosp. XIII. 59 In the lactating breast the number of acini is very large.

1913 17th Internat. Congr. Med. III. ii. 173 The pregnant and lactating animals survived the extirpation of the adrenal glands much longer than normal, non~pregnant, or male animals.

1948 New Biol. 4 127 Purified preparations of prolactin were found inferior to more crude pituitary preparations..in their power to increase the milk yield of cows already lactating.

1953 E. Gellhorn Physiol. Found. Neurol. & Psychiatry xiii. 305 There is still another function of oxytocin..: the ejection of milk from the lactating mammillary gland.

1956 J. S. Folley Physiol. & Biochem. Lactation ii. 28 Mammary tissue from lactating rats..exhibits much greater respiratory activity in vitro.

1956 Jrnl. Pediatrics 49 550/2 She had suckled all her daughter's children and lactated freely each time.

1971 J. Z. Young Introd. Study Man xxiv. 319 To estimate reliably the number of children born to a group of women under the conditions that their husbands are freely available and that they are not using contraceptives or lactating is nearly impossible.