Definitions for kaonˈkeɪ ɒn
Random House Webster's College Dictionary
a meson with strangeness +1 and either positive or zero electric charge, or its antiparticle with strangeness −1 and either negative or zero electric charge.
Ref: Symbol: K 3 5; Also called K meson.
Origin of kaon:
1955–60; ka- (sp. of name of letter k) + (mes )on
kaon, kappa-meson, k-meson, K particle(noun)
an unstable meson produced as the result of a high-energy particle collision
any of four unstable subatomic particles, mesons, they are a combination of a strange quark or antiquark and either an up or down quark or antiquark
Origin: From contracted pronunciation of K-meson