prolactin
/pɹoʊˈlæktɪn/
"prolactin" is a 9-letter English headword indexed on PlainSpell.
The verdict
“prolactin” is uncommon English (frequency #61,728 among 4,417 “P” headwords), classed as a noun. The kind of spelling people second-guess.
- #61,728
- frequency rank, English
- 4,417
- “P” headwords
According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - A peptide gonadotrophic hormone secreted by the pituitary gland; it stimulates growth of the mammary glands and lactation in females.
Corpus desk
Index EN-prolactin · prolactin · English
prolactin · rank #61,728 · 0 variants · 0 confusables
- FREQ-RARE #61,728
- LEN-LONG 9 letters
- VOW-3 3 vowels
- CONFUS-0 No pairs
- VAR-0 0 variants
- BOOK-MID 4,417
- PHOTO-FINISH profligate
Nearest frequency peer: profligate (-1 rank slots)
Read with this headword: Spelling guide for this pattern
Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.
Long-tail ranks near “prolactin”
Sparse band: bars invert rank so rarer forms read shorter
- PRISMA
PRISMA
38,277 corpus weight
- priv
priv
38,276 corpus weight
- processional
processional
38,275 corpus weight
- profligate
profligate
38,274 corpus weight
- prolactin
prolactin
38,273 corpus weight
- proteomics
proteomics
38,271 corpus weight
What this shows Long-tail view: where “prolactin” sits against similarly uncommon English ranks.
| Property | Value |
|---|---|
| Headword | prolactin |
| Language | English |
| Part of speech | Noun |
| IPA | /pɹoʊˈlæktɪn/ |
| Letters | 9 |
| Frequency rank | #61,728 |
| Misspellings tracked | 0 |
| Confusable pairs | 0 |
| Source | Wiktionary (kaikki.org) |
Long-tail rank of “prolactin” in English
Rare enough to double-check
prolactin is uncommon English at frequency #61,728 among 4,417 “P” headwords, classed as anoun, transcribed /pɹoʊˈlæktɪn/. Rarity is why readers land here mid-draft. Gloss: "A peptide gonadotrophic hormone secreted by the pituitary gland; it stimulates growth of the mammary glands and lactation in females.".
The misspelling generator found no plausible variants for prolactin, typically a sign the spelling maps closely to how the word sounds. This headword has no recorded confusable partner, which typically means the spelling is too distinctive to be mistaken for another word.
Etymologically, the entry records: From pro- (from Ancient Greek πρό (pró, “before”)) + lact- (variation of lacto-, from Latin lac (“milk”)) + -in (modification of -ine). The correct English form is prolactin, spelled P-R-O-L-A-C-T-I-N.
Definition
- 1A peptide gonadotrophic hormone secreted by the pituitary gland; it stimulates growth of the mammary glands and lactation in females.
Recorded use
Wiktionary exampleThese source excerpts show how prolactin appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.
Men get a dose of the hormone prolactin after orgasm and this acts as a sedative.
Etymology
From pro- (from Ancient Greek πρό (pró, “before”)) + lact- (variation of lacto-, from Latin lac (“milk”)) + -in (modification of -ine).
Synonyms
This word in other languages
Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.
Frequently Asked Questions
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Similar English words by spelling shape
Same letter count and similar misspelling depth for "prolactin", not the corpus desk frequency band.
Same letter count
Frequency-ranked English headwords with 9 letters (nearest by frequency rank).