[ op-suh-nin ]
/ ˈɒp sə nɪn /
a constituent of normal or immune blood serum that makes invading bacteria more susceptible to the destructive action of the phagocytes.
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Origin of opsonin
1900–05; <Latin opsōn(ium) victuals (<Greek opsōnía, derivative of opsōneîn to buy provisions) + -in2
OTHER WORDS FROM opsoninop·so·noid, adjective
Words nearby opsonin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Example sentences from the Web for opsonin
In the case of diphtheria, the antitoxin appears to be more efficacious than an opsonin.The Pros and Cons of Vivisection|Charles Richet
The "opsonin," or "relish," is something exuded into or produced in the blood fluid when the attacking microbe arrives.More Science From an Easy Chair|Sir E. Ray (Edwin Ray) Lankester
British Dictionary definitions for opsonin
/ (ˈɒpsənɪn) /
a constituent of blood serum that renders invading bacteria more susceptible to ingestion by phagocytes in the serum
Derived forms of opsoninopsonic (ɒpˈsɒnɪk), adjective
Word Origin for opsonin
C20: from Greek opsōnion victuals
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Medical definitions for opsonin
[ ŏp′sə-nĭn ]
An antibody in blood serum that causes bacteria or other foreign cells to become more susceptible to the action of phagocytes.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.