ほうしゃせいどういかく 放射性同位核 LinksSentence search for 放射性同位核Sentence search for ほうしゃせいどういかくKanji details for 放, 射, 性, 同, 位 and 核Edit in JMdict Noun1. radioisotopePhysics, Rare term, See also 放射性同位体 Discussions Log in to talk about this word.