# prosthesis

> English word · Noun · IPA /pɹɒsˈθiːsɪs/ · frequency rank #37,173

## Definitions
1. An artificial replacement for a body part, either internal or external.
2. Prothesis.

## Etymology
Via Latin, from Ancient Greek πρόσθεσις (prósthesis, “addition”), from προστίθημι (prostíthēmi, “I add”), from πρός (prós, “towards”) + τίθημι (títhēmi, “I place”), from Proto-Indo-European *próti, *préti + *dʰédʰeh₁ti (“to be putting, to be placing”). By surface analysis, prosth- + -esis.

## Easily confused with
- **prosthetic** (https://plainspell.com/en/vs/prosthesis-vs-prosthetic)
- **prosthetics** (https://plainspell.com/en/vs/prosthesis-vs-prosthetics)

## Common misspellings (16)
`porsthesis`, `pprosthesis`, `proshtesis`, `prossthesis`, `prostehsis`, `prostheiss`, `prosthesiss`, `prosthessi`, `prosthessis`, `prosthhesis`, `prosthseis`, `prostthesis`, `protshesis`, `prrosthesis`, `prsothesis`, `rposthesis`

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