We found 3 dictionaries that define the word psi particles:

General (3 matching dictionaries)

1. psi particles: Merriam-Webster
2. psi particles: Collins English Dictionary
3. psi particles: Wiktionary

(Note: See psi_particle as well.)

Definitions from Wiktionary (psi particle) ▸ noun:  Synonym of J/psi particle ▸ Also see psi_particle ▸ Words similar to psi particles ▸ Usage examples for psi particles ▸ Idioms related to psi particles ▸ Wikipedia articles (New!) ▸ Words that often appear near psi particles ▸ Rhymes of psi particles ▸ Invented words related to psi particles