Definition
Mesonic relates to mesons, subatomic particles composed of a quark and an antiquark. Mesons are unstable and decay rapidly into other particles. They are intermediate in mass between leptons and baryons. They mediate the strong nuclear force, which binds protons and neutrons in the nucleus. Think of them as the glue holding atomic nuclei together. Mesonic interactions are fundamental to understanding nuclear physics. They are studied in high-energy physics experiments at particle accelerators.