radioimmunodiffusion

[ rā′dē-ō-ĭm′yə-nō-dĭ-fyōōzhən, -ĭ-myōō′- ]

n.

A method for the study of antigen-antibody reactions by gel diffusion using a radioisotope-labeled antigen or antibody.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.