k particle k • k ration · · · Info · Definitions · Synonyms · Characters · · k particle · · Text Common · · Latin · · Scripts 10 · · Length 4 · · Syllables Definitions · · · (noun) an unstable meson produced as the result of a high-energy particle collision. Synonyms: kaon, kappa-meson, k-meson, K particle. · · Noun Definition 1 Synonyms · · · kaon · · Synonym 1 kappa-meson · · Synonym 2 k-meson · · Synonym 3 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 k latin small letter k U+006B l latin small letter l U+006C p latin small letter p U+0070 r latin small letter r U+0072 t latin small letter t U+0074