the study of biological substances or processes with the aid of antigens or antibodies labeled with a radioactive isotope.
Origin of radioimmunology
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The study of immunity by radiolabeling and other radiological methods.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.