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radioactive element
med., chem.	radioélément m
nucl.phys., радиоакт.	radioélément m (a chemical element, not a nuclide)
polit.	élément radioactif
радиоакт.	élément chimique radioactif (a chemical element, not a nuclide); élément radioactif (a chemical element, not a nuclide)

radioactive element: 11 phrases in 4 subjects

Electronics	2
General	1
Natural sciences	2
Радиоактивное излучение	6