Any of various methods of detecting or measuring antigen or antibody using radiolabelled reagents; spec. a highly sensitive assay in which the…

Designating a form of radioimmunoassay used to measure IgE antibodies to specific allergens; esp. in radioallergosorbent test.

a biological assay technique in which the test substance is determined by allowing it to bind to a suitable protein or antibody in competition with…

Biology and Medicine. Designating a method of studying and measuring a biologically active substance and its cellular receptors using a…