# pi-minus

> English word · Noun

## Definitions
1. The negative pion, composed of a down quark and an anti-up quark.

## Etymology
From the pronunciation of its symbol π⁻.

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