Definition of lactation in English:

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Pronunciation: /lakˈteɪʃ(ə)n/


[mass noun]
1The secretion of milk by the mammary glands.
Example sentences
  • Mammary glands during lactation were excised from two swh/swh and two swh / + females on the day of their delivery.
  • Such features may vary according to whether the patient was pregnant, lactating, or had recently terminated her pregnancy or lactation at the time of surgical excision.
  • From here it was an easy step for early modern suspicion to extend to all female bodily fluids: tears, menstruation, lactation.
1.1The action of suckling an infant.
Example sentences
  • Studies of captive lorises have shown that after a female has given birth, the demands of lactation and raising an infant may keep her from mating again for ten to fourteen months.
  • When a mother or an infant is hospitalized, lactation should be continued if possible.
  • Major demands are placed on the mother by the fetus for calcium during pregnancy and by the infant during lactation.



Example sentences
  • Abundant breast lobules were present in the adjacent breast tissue in all cases in this subgroup, but these showed little evidence of active lactational change.
  • The longer the breastfeeding period, the longer the possibility of lactational amenorrhoea - the time when a women is unlikely to be ovulating and therefore to get pregnant.
  • All normal and benign biopsy specimens, with the exception of the 2 lactational adenomas, showed varying numbers of positive epithelial cells and lymphocytes.


Mid 17th century: from Latin lactatio(n-), from lactare 'suckle', from lac, lact- 'milk'.

For editors and proofreaders

Line breaks: lac|ta¦tion

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