noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   Any of three semistable mesons, having positive, negative or neutral charge, composed of up and down quarks/antiquarks. particle
2. 2
   a meson involved in holding the nucleus together; produced as the result of high-energy particle collision wordnet

Synonyms

All synonyms

neutronparticlepi mesonpi mesonpi-meson

Etymology

From pi + -on, as alteration of pi-meson.

Related phrases

negative pionpion rocketpositive pion

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