radioimmunoelectrophoresis

noun

ra·​dio·​im·​mu·​no·​elec·​tro·​pho·​re·​sis -i-ˌlek-trə-fə-ˈrē-səs 

plural radioimmunoelectrophoreses -ˌsēz 

: immunoelectrophoresis in which the substances separated in the electrophoretic system are identified by radioactive labels on antigens or antibodies

radioimmunoelectrophoretic

-ˈret-ik 

adjective