lactone

\lak.tɔn\

/\lak.tɔn\/ noun

The verdict

“lactone” is uncommon French (outside the top frequency list), classed as a noun. The kind of spelling people second-guess.

Unranked
below top-frequency French
7
letters

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Un hétérocycle oxygéné, provenant de la cyclisation (ou lactonisation) d'hydroxyacides (acide lactique, acide hydroxybutyrique) par estérification interne.

Corpus desk

Index FR-lactone · lactone · French

lactone · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 7 letters
  • VOW-3 3 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "L" thin
  • PHOTO-UNK Peer pending

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.

Key facts for lactone
PropertyValue
Headwordlactone
LanguageFrench
Part of speechNoun
IPA\lak.tɔn\
Letters7
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “lactone” sits in French frequency

lactone falls outside the top-100,000 ranked French words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

lactone is uncommon French outside the top frequency list, classed as anoun, transcribed \lak.tɔn\. Rarity is why readers land here mid-draft. Gloss: "Un hétérocycle oxygéné, provenant de la cyclisation (ou lactonisation) d'hydroxyacides (acide lactique, acide hydroxybutyrique) par estérification interne.".

We couldn't generate a plausible misspelling set for lactone, a sign its spelling follows regular French conventions. No confusable counterpart is on file for this word, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

This entry's etymology isn't recorded, so any spelling logic here comes from how the word's sounds map to letters, not a documented origin story. The correct French form is lactone, spelled L-A-C-T-O-N-E.

Definition

  1. 1
    Un hétérocycle oxygéné, provenant de la cyclisation (ou lactonisation) d'hydroxyacides (acide lactique, acide hydroxybutyrique) par estérification interne.

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). See the methodology for how each field is sourced and updated.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 6, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "lactone"?
"lactone" is spelled L-A-C-T-O-N-E. The IPA pronunciation is \lak.tɔn\.
What does "lactone" mean?
As a noun, "lactone" means: Un hétérocycle oxygéné, provenant de la cyclisation (ou lactonisation) d'hydroxyacides (acide lactique, acide hydroxybutyrique) par estérification interne.
How do you pronounce "lactone"?
The IPA (International Phonetic Alphabet) transcription for "lactone" is \lak.tɔn\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "lactone" come from?
"lactone" is a French word. PlainSpell covers definitions, pronunciations, and spelling data across English, Spanish, Portuguese, French, and German.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list