NORM
Naturally Occurring Radioactive Material (NORM). Radioactive material containing no significant amounts of radionuclides other than naturally occurring radionuclides, such us uranium, thorium, potassium and any of their decay products, such as radium and radon.
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