Definition of prolactin
: a protein hormone of the anterior lobe of the pituitary that induces lactation
Recent Examples of prolactin from the Web
First, researchers have observed that the hormone prolactin increases during sleep and causes drowsiness in animals.
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Origin and Etymology of prolactin
2pro- + lact- + 1-in
First Known Use: 1932See Words from the same year
Medical Definition of prolactin
: a protein hormone of the adenohypophysis of the pituitary gland that induces and maintains lactation in the postpartum mammalian female—abbreviation PRL; called also luteotropic hormone, luteotropin, mammotropin
Learn More about prolactin
Britannica.com: Encyclopedia article about prolactin
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