radioimmunoassay

(noun)

A procedure that uses the binding of a radioactively labeled substance to an antibody in order to analyze minute amounts of biological compounds.

Related Terms

Examples of radioimmunoassay in the following topics:

  • Early Pregnancy Tests

    • Direct measurement of antigens, such as hCG, was made possible with the invention of the radioimmunoassay in 1959.
    • Radioimmunoassays require sophisticated apparatus and special radiation precautions and are expensive.