To lactate is to produce milk for feeding babies. All female mammals who give birth lactate.

A mother cow has to lactate in order to feed her calves, and so that she can be milked by a farmer too. Mothers who nurse their babies lactate, whether they're humans, cats, goats, or skunks. Lactation, "the secretion of milk," came first, from the Late Latin lactationem, "a suckling," from the root lac, "milk."

Definitions of lactate
  1. verb
    give suck to
    synonyms: breastfeed, give suck, nurse, suck, suckle, wet-nurse
    draw into the mouth by creating a practical vacuum in the mouth
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    feed (infants) with a bottle
    type of:
    feed, give
    give food to
  2. noun
    a salt or ester of lactic acid
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    type of:
    formed by reaction between an acid and an alcohol with elimination of water
    a compound formed by replacing hydrogen in an acid by a metal (or a radical that acts like a metal)
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