# valine

> English word · Noun · frequency rank #90,035

## Definitions
1. An essential amino acid 2-amino-3-methylbutanoic acid found in most animal proteins.

## Etymology
From valerian + -ine.

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