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n. A laboratory technique that makes use of the binding between an antigen and its homologous antibody in order to identify and quantify the specific antigen or antibody in a sample.

n. A test for the presence of a substance using the reaction of an antibody to its antigen, making use of the high selectivity of components of biological immune systems.

n. identification of a substance (especially a protein) by its action as an antigen

"For about $80, you can get an EIA (or enzyme immunoassay), which determines whether your blood contains antibodies to hepatitis C. Doctors normally confirm a positive test result with a second antibody test called RIBA."

bioassay   

radioimmunoassay   

catalyst/ligand    indoleamine    aldose    transcarbamylase    blinky