# acyl

> English word · Noun · IPA /ˈæ.sɪl/ · frequency rank #53,983

## Definitions
1. Any of class of organic radicals, RCO-, formed by the removal of a hydroxyl group from a carboxylic acid.

## Etymology
Ultimately from Latin ac(eō) + -yl.

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