Nuclide
A species of atom, characterized by its mass number A, atomic number Z, and nuclear energy state. Radioactive nuclides are referred to as radionuclides or radioisotopes.
Glossary Source
JRC EU CBRNe Glossary
(
EU Glossary on Chemical, Biological, Radiological, Nuclear, and Explosive risks
)
https://publications.jrc.ec.europa.eu/repository/bitstream/JRC128863/JRC128863_01.pdf