# keratin

> English word · Noun · IPA /ˈkɛrətɪn/ · frequency rank #48,305

## Definitions
1. The protein of which hair and nails are composed.

## Etymology
Borrowed from German Keratin, from Ancient Greek κέρας (kéras, “horn”) + -in. Doublet of carat.

## Easily confused with
- **Keaton** (https://plainspell.com/en/vs/keaton-vs-keratin)

## Common misspellings (10)
`ekratin`, `keartin`, `keraitn`, `keratinn`, `keratni`, `kerattin`, `kerratin`, `kertain`, `kkeratin`, `kreatin`

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