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radioactive element
earth.sc.	radioaktives Element
med., chem.	Radioelement n
nucl.phys., radiat.	radioaktives Element (a chemical element, not a nuclide)
radiat.	Radioelement n (a chemical element, not a nuclide)

radioactive element : 11 phrases in 5 subjects

Electronics	4
Natural sciences	1
Nuclear physics	1
Physics	1
Radiation	4