- radioimmunodiffusion
- A method for the study of antigen-antibody reactions by gel diffusion using radioisotope-labeled antigen or antibody.
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ra·dio·im·mu·no·dif·fu·sion (ra″de-o-im″u-no-dĭ-fuґzhən) immunodiffusion conducted with radioisotope-labeled antibodies or antigens.
Medical dictionary. 2011.