Definition of Radioimmunoassay
Radioimmunoassay: A very sensitive, specific laboratory test (assay) that uses radiolabeled and unlabeled substances in an immunological (antibody-antigen) reaction.
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=5185
Last Editorial Review: 3/19/2012
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