Designating the toxic or other damaging effects on a living organism of a radioactive substance present in its tissues; relating to or characterized by such effects.
Origin
1930s (in an earlier sense). From radio- + toxic.
Definition of radiotoxic in US English:
radiotoxic
adjectiveˌreɪdɪəʊˈtɒksɪk
Biology
Designating the toxic or other damaging effects on a living organism of a radioactive substance present in its tissues; relating to or characterized by such effects.