# antiproton

> English word · Noun

## Definitions
1. The antiparticle of the proton, having a negative electric charge.

## Etymology
From anti- + proton.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/antiproton