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prolactin.

A peptide gonadotrophic hormone secreted by the pituitary gland; it stimulates growth of the mammary glands and lactation in females.

9 characters3 syllables approx.English language

Meaning & usage

noun/pɹoʊˈlæktɪn/General-American
  1. A peptide gonadotrophic hormone secreted by the pituitary gland; it stimulates growth of the mammary glands and lactation in females.

    uncountable · usually
Where this word comes from

From pro- (from Ancient Greek πρό (pró, “before”)) + lact- (variation of lacto-, from Latin lac (“milk”)) + -in (modification of -ine).

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.