Gluons (glue and the suffix -on) are elementary expressions of quark interaction, and are indirectly involved with the binding of protons and neutrons together in atomic nuclei. In technical terms, they're vector gauge bosons that mediate strong color charge interactions of quarks in quantum chromodynamics (QCD). Unlike the electric charge neutral photon of quantum electrodynamics (QED), gluons themselves carry color charge and therefore participate in the strong interaction in addition to medi… (More on Gluon)