transuranium
/ˌtrænsjʊˈreɪniəm/
adjective
- Relating to chemical elements with an atomic number greater than that of uranium (92).
- Scientists create transuranium elements in laboratories using particle accelerators.
- Plutonium is one of the best-known transuranium elements.
- Transuranium elements are all radioactive and are not found naturally in large amounts.
noun
- A chemical element with an atomic number greater than 92.
- Many transuraniums are used in nuclear reactors and medical imaging.
- The periodic table includes a whole row of transuraniums beyond uranium.
- Neptunium was the first transuranium to be discovered.