opsonin

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opsonin

 [op´sŏ-nin]
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.

op·so·nin

(op'sŏ-nin),
Any blood serum protein that binds to antigens, enhancing phagocytosis (for example, C3b of the complement system, specific antibodies).
[G. opson, boiled meat, provisions, fr. hepsō, to boil, + -in]
Farlex Partner Medical Dictionary © Farlex 2012

opsonin

(ŏp′sə-nĭn)
n.
An antibody or product of complement activation in blood serum that causes bacteria or other foreign cells to become more susceptible to the action of phagocytes.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

op·so·nin

(op'sŏ-nin)
A substance that binds to antigens, enhancing phagocytosis.
[G. opson, boiled meat, provisions, fr. hepsō, to boil, + -in]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

opsonin

One of a number of substances, especially an antibody, naturally present in the blood that bind to the surface of bacteria to make them more readily susceptible to attack and destruction by PHAGOCYTES.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

opsonin

a type of ANTIBODY which binds to ANTIGENS, increasing their susceptibility to phagocytosis by other antibodies.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005