immunoassay

noun

1. any laboratory method for detecting a substance by using an antibody reactive with it.

noun

1. immunol a technique of identifying a substance by its ability to bind to an antibody

n.

1. A laboratory or clinical technique that uses the specific binding between an antigen and its homologous antibody to identify and quantify a substance in a sample.immunochemical assay

1. A laboratory technique that identifies and quantifies (usually in minute amounts) a protein such as a hormone or an enzyme, based on its ability to act as an antigen or antibody in a chemical reaction.