Meaning of radioimmunology

ra•di•o•im•mu•nol•o•gy

Pronunciation: (rā"dē-ō-im"yu-nol'u-jē), [key]
— n.
  1. the study of biological substances or processes with the aid of antigens or antibodies labeled with a radioactive isotope.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.