Standard Lemma guide

prolactin

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • General-American: /pɹoʊˈlæktɪn/
  • General-American: Recorded audio is listed in the source snapshot.
  • CMU ARPABET: P R OW0 L AE1 K T AH0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

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

Definition source: English Wiktionary via Wiktextract

Usage: uncountable, usually

Topics: biochemistry, biology, chemistry, microbiology, natural-sciences, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

2

noun

Meaning 2

gonadotropic hormone secreted by the anterior pituitary; in females it stimulates growth of the mammary glands and lactation after parturition

Definition source: Princeton WordNet 3.0

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: lactogenic hormone, luteotropin

Antonyms: none provided

Broader terms: gonadotropin, gonadotrophin, gonadotropic hormone, gonadotrophic hormone, lactogen

History

Etymology

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

Across languages

Translations

19 source translations are retained for this English entry.

  • Albanian: prolaktina — hormone
  • Basque: prolaktina — hormone
  • Chinese Mandarin: 催乳素 (cuīrǔsù) — hormone
  • Czech: prolaktin — hormone
  • Finnish: prolaktiini — hormone
  • French: prolactine — hormone
  • German: Prolaktin — hormone
  • Hungarian: prolaktin — hormone
  • Indonesian: laktogen — hormone
  • Irish: prólachtain — hormone
  • Italian: prolattina — hormone
  • Japanese: プロラクチン (purorakuchin) — hormone
  • Māori: taiaki waiū — hormone
  • Portuguese: prolactina — hormone
  • Romanian: prolactină — hormone
  • Russian: пролакти́н (prolaktín) — hormone
  • Serbo-Croatian: prolaktin — hormone
  • Spanish: prolactina — hormone
  • Swedish: prolaktin — hormone