# isoleucine

> English word · Noun · IPA /ˌaɪ.səˈluː.siːn/

## Definitions
1. An essential amino acid, C₆H₁₃NO₂, isomeric with leucine, found in most animal proteins.

## Etymology
From iso- + leucine.

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