# lysine

> English word · Noun · IPA /ˈlaɪsin/ · frequency rank #41,744

## Definitions
1. An amino acid, C₆H₁₄N₂O₂, in L- or D-forms.
2. An amino acid, C₆H₁₄N₂O₂, in L- or D-forms.

## Etymology
From lysis + -ine, in reference to its tendency to participate in catalysis.

## Easily confused with
- **line** (https://plainspell.com/en/vs/line-vs-lysine)
- **lying** (https://plainspell.com/en/vs/lying-vs-lysine)
- **losing** (https://plainspell.com/en/vs/losing-vs-lysine)
- **Levine** (https://plainspell.com/en/vs/levine-vs-lysine)

## Common misspellings (9)
`llysine`, `lsyine`, `lyisne`, `lysien`, `lysinne`, `lysnie`, `lyssine`, `lyysine`, `ylsine`

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