a species of atom characterized by its atomic number and its mass number
See also isotope
Word origin
C20: from nucleo- + -ide, from Greek eidos shape
nuclide in American English
(ˈnuˌklaɪd; ˈnjuˌklaɪd)
noun
a specific type of atom that is characterized by its nuclear properties, such as the number of neutrons and protons and the energy state of its nucleus