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radio jet
radio source
radio spectrum
radio star
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radio wave
radioactive
radioactive dating
radioactive decay
radioactive series
radioactive tracer
radioactive waste
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radioisotope

ra·di·o·i·so·tope [ ràydee ō ssə tp ] (plural ra·di·o·i·so·topes)


noun 
Definition:
 
radioactive isotope: a form of a chemical element isotope that is radioactive


ra·di·o·i·so·top·ic [ ràydee ō ssə tóppik ] adjective
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