Definition that contains baryon number
- meson an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0
- lepton an elementary particle that participates in weak interactions; has a baryon number of 0
- baryon any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions; a hadron with a baryon number of +1
- heavy particle any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions; a hadron with a baryon number of +1
- antibaryon the antiparticle of a baryon; a hadron with a baryon number of -1
- mesotron an elementary particle responsible for the forces in the atomic nucleus; a hadron with a baryon number of 0