Hadron is a subatomic particle of a type including the baryons and mesons, which can take part in the strong interaction. Baryon is a subatomic particle, such as a nucleon or hyperon, that has a mass equal to or greater than that of a proton. Meson is a a subatomic particle which is intermediate in mass between an electron and a proton and transmits the strong interaction that binds nucleons together in the atomic nucleus