familon

== English == === Etymology === From famille +‎ -on, patterned after other particle names. === Pronunciation === IPA(key): /ˈfæmɪlɒn/ === Noun === familon (plural familons) (physics, particle physics) A hypothetical Nambu–Goldstone boson arising from the spontaneous breaking of a global family symmetry that distinguishes between generations of quarks and leptons.