radiometal1
/ˈreɪdɪəʊˌmɛtl/noun
Also with capital initial. Any of a group of alloys consisting largely of nickel and iron (typically between 35 and 48 per cent nickel), noted for their high magnetic permeability.
Origin
1930s; earliest use found in Journal of Scientific Instruments. From radio- + metal. The alloys were apparently so named on account of their frequent use in transformer cores for radios.
radiometal2
/ˈreɪdɪəʊˌmɛtl/noun
Biochemistry. A radioactive metallic element or atom.
Origin
1960s. From radio- + metal.