(n) an elementary particle with a negative charge and a half-life of 2 microsecond; decays to electron and neutrino and antineutrino, Syn. negative muon, mu-meson
[くうしんさい, kuushinsai] (n) (See 甕菜) ipomoea aquatica; kang kong; water morning glory; (Chinese) water spinach; water convolvulus; swamp cabbage; ong choy; hung tsai; rau muong; pak boong