# pion rocket

> English word · Noun

## Definitions
1. A theoretical type of antimatter rocket which uses proton-antiproton fuel, and magnetic rocket funnels to direct the π-on exhaust. The pi meson particles are created by the matter-antimatter annihilation of protons and antiprotons.

## Etymology
From the type of exhaust expelled by the rocket, being composed of π subatomic particles (π mesons, aka pions).

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