Origin: Latin suffix -tion
Lactation has 4 different meanings across 1 category:
the period following birth during which milk is secreted
"lactation normally continues until weaning"
the production and secretion of milk by the mammary glands
"After giving birth, her body entered lactation as it began producing milk for her newborn."
The secretion of milk from the mammary gland of a female mammal.
"The nurse's postpartum lactation began only after her baby successfully latched on for the first time that morning."