1. An elementary particle with strong nuclear interactions, baryon number B = 0, spin J = 0, positive parity, negative charge parity, isotopic spin I = 1, and mass 1234 MeV, that decays into an omega meson and a pion.

2. A meson consisting of a combination of a bottom (b ) quark with an ordinary up (u ) or down (d ) quark, having a mass of approximately 5.2 GeV.