# lactone

> English word · Noun · IPA /ˈlæktəʊn/ · frequency rank #98,346

## Definitions
1. A cyclic intramolecular ester derived from a hydroxy acid.

## Etymology
From lacto- + -one.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/lactone