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[im-yuh-noh-di-fyoo-zhuh n, ih-myoo-] /ˌɪm yə noʊ dɪˈfyu ʒən, ɪˌmyu-/
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 Dictionary, © Random House, Inc. 2017.
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immunodiffusion in Medicine

immunodiffusion im·mu·no·dif·fu·sion (ĭm'yə-nō-dĭ-fyōō'zhən, 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.
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