A method for the study of antigen-antibody reactions by gel diffusion using radioisotope-labelled antigen or antibody. ... (05 Mar 2000) ... 
(ra″de-o-im″u-no-dĭ-fu´zhәn) immunodiffusion conducted with radioisotope-labeled antibodies or antigens.
Type: Term Pronunciation: rā′dē-ō-im′yū-nō-di-fyū′zhŭn Definitions: 1. A method for the study of antigen-antibody reactions by gel diffusion using radioisotope-labeled antigen or antibody.