the study of biological substances or processes with the aid of antigens or antibodies labeled with a radioactive isotope.

1960–65; radio- + immunology

radioimmunological [rey-dee-oh-im-yuh-nl-oj-i-kuhl, -i-myoo-] , adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Medical Dictionary

radioimmunology ra·di·o·im·mu·nol·o·gy (rā'dē-ō-ĭm'yə-nŏl'ə-jē)
The study of immunity by radiolabeling and other radiological methods.

ra'di·o·im'mu·no·log'i·cal (-nə-lŏj'ĭ-kəl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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