# Poisson

> English word · Proper noun · IPA /ˈpwɑː.sɒn/ · frequency rank #39,033

## Definitions
1. A surname in French

## Etymology
Unadapted borrowing from French Poisson. The noun sense is named after French mathematician Siméon Denis Poisson (1781–1840).

## Easily confused with
- **prison** (https://plainspell.com/en/vs/poisson-vs-prison)
- **poison** (https://plainspell.com/en/vs/poison-vs-poisson)
- **piston** (https://plainspell.com/en/vs/piston-vs-poisson)

## Common misspellings (7)
`opisson`, `piosson`, `poisosn`, `poissno`, `poissonn`, `posison`, `ppoisson`

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