noun ·Rare ·Advanced level

Definitions

Noun

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

Synonyms

All synonyms

negative pionpi-minus meson

Etymology

From the pronunciation of its symbol π⁻.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.