verb (used with object), op·so·nized, op·so·niz·ing. Immunology.

to increase the susceptibility of (bacteria) to ingestion by phagocytes.

Also especially British, op·so·nise.

Origin of opsonize

Related formsop·so·ni·za·tion, noun
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British Dictionary definitions for opsonization


opsonise opsonify (ɒpˈsɒnɪˌfaɪ)


(tr) to subject (bacteria) to the action of opsonins
Derived Formsopsonization, opsonisation or opsonification, noun
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

opsonization in Medicine




The process by which bacteria are altered by opsonins so as to become more readily and more efficiently engulfed by phagocytes.




To make bacteria or other cells 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.