# antigen

> English word · Noun · frequency rank #21,994

## Definitions
1. A substance that induces an immune response, usually foreign (nonself) but not always so.

## Etymology
From French antigène, from anti- + gène.

## Easily confused with
- **Antigua** (https://plainspell.com/en/vs/antigen-vs-antigua)

## Common misspellings (10)
`anitgen`, `anntigen`, `antgien`, `antiegn`, `antigenn`, `antiggen`, `antigne`, `anttigen`, `atnigen`, `natigen`

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