Where does “meson” come from?

I need to work through this chain carefully, but I notice there are significant issues with it that make it impossible to write an accurate etymology. The chain as given has problems: 1. "English on" doesn't connect to "meson" 2. Japanese 音 (on, meaning "sound") has no plausible connection to the physics term "meson" 3. The Proto-Indo-European forms listed (médʰyos, óynos, aukw-) don't clearly connect to each other or lead to "meson" 4. The chain appears corrupted or contains unrelated terms The actual etymology of "meson" (the subatomic particle) comes from Greek μέσος (mésos, "middle") + the suffix -on, coined by physicists because mesons have intermediate mass between electrons and protons. **I cannot write the requested sentence because the chain provided does not accurately

meson (English): The mesial plane dividing the body into similar...