1. radiolabel - Noun
2. radiolabel - Verb
radiolabel (third-person singular simple present radiolabels, present participle radiolabeling or radiolabelling, simple past and past participle radiolabeled or radiolabelled)
To tag a substance (especially a biological substance) with a radioactive tracer
radiolabel (plural radiolabels)
A radioactive tracer; a radiotracer