[im-yuh-noh-di-fyoo-zhuh n, ih-myoo-]


any of various analytical techniques that involve antigen and antibody solutions diffusing toward each other in a gel until antibody binds specifically to antigen to form a precipitate.

Origin of immunodiffusion

First recorded in 1955–60; immuno- + diffusion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

immunodiffusion in Medicine


[ĭm′yə-nō-dĭ-fyōōzhən, ĭ-myōō′-]


A technique for studying reactions between antigens and antibodies by observing precipitates formed by the combination of specific antigens and antibodies that have diffused in a gel in which they have been separately placed.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.