What is Antineutron?
Antineutron definition and meaning on Dictionary terms:
an elementary particle having no charge and having a mass and spin equal to that of the neutron but with magnetic moment opposite to that of the neutron; the antiparticle of the neutron.
Also anA.ti-neuA.tron. opposing the building, stockpiling, or use of neutron bombs: The antineutron lobby was outnumbered.