Standard Lemma guide

lactone

noun · 1 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

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  • /ˈlæktəʊn/
  • Southern-England: Recorded audio is listed in the source snapshot.
  • rhymes with -æktəʊn
  • CMU ARPABET: L AE1 K T OW0 N Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.

1

noun

Meaning 1

A cyclic intramolecular ester derived from a hydroxy acid.

Definition source: English Wiktionary via Wiktextract

Topics: chemistry, natural-sciences, organic-chemistry, physical-sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Etymology tree Latin lacder. English lacto- German Ketonbor. English ketone English -one English lactone From lacto- + -one.

Across languages

Translations

9 source translations are retained for this English entry.

  • Catalan: lactona — cyclic intramolecular ester
  • Chinese Mandarin: 內酯 /内酯 (nèizhǐ) — cyclic intramolecular ester
  • Finnish: laktooni — cyclic intramolecular ester
  • French: lactone — cyclic intramolecular ester
  • German: Lacton — cyclic intramolecular ester
  • Italian: lattone — cyclic intramolecular ester
  • Polish: lakton — cyclic intramolecular ester
  • Spanish: lactona — cyclic intramolecular ester
  • Turkish: lakton — cyclic intramolecular ester