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an antibody that renders bacteria and other cells susceptible to phagocytosis. adj., adj opson´ic.
immune opsonin an antibody that sensitizes a particulate antigen to phagocytosis.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
antibodies formed in response to stimulation by a specific antigen, either as a result of an attack of a disease or as a result of injections with a suitably prepared suspension of the specific microorganism.
Farlex Partner Medical Dictionary © Farlex 2012
Opsonin formed after stimulation by a specific antigen.
See also: opsonin
Medical Dictionary, © 2009 Farlex and Partners