A hemolytic plaque assay is a
technique used to show that certain
antibodies are secreted by antibody-making cells when these cells are mixed with
red blood cells. The mixture is spread onto a plate of
agar; if a
plaque appears, it means that the red blood cells have been destroyed (by
hemolysis) by the antibodies.
From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.