nuclide
nu.clide \'n(y)u:-.kli-d\ \n(y)u:-'klid-ik\ n [nucleus + -ide, irreg, fr. Gk eidos form - more at IDOL] : a species of atom characterized by the constitution of its nucleus and h ence by the number of protons, the number of neutrons, and the energy content - nu.clid.ic aj