say it: PAHY-may-zahn
pi-meson is a noun meaning "a meson involved in holding the nucleus together; produced as the result of high-energy particle collision". It carries one recorded sense.
Definitions, synonyms and semantic relations for pi-meson come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.