Definitions for "Opsonin"
A substance capable of enhancing phagocytosis. Opsonins include antibodies and the C3b molecule of the complement system.
A serum protein that renders microorganisms and other foreign material more susceptible to phagocytosis.
an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes
a plasma protein binding to bacteria