[ op-suh-nahyz ]
/ ˈɒp səˌnaɪz /

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 forms

op·so·ni·za·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for opsonization


opsonise opsonify (ɒpˈsɒnɪˌfaɪ)

/ (ˈɒpsəˌnaɪz) /


(tr) to subject (bacteria) to the action of opsonins

Derived Forms

opsonization, 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

Medicine definitions for opsonization (1 of 2)


[ ŏp′sə-nĭ-zāshən ]


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

Medicine definitions for opsonization (2 of 2)


[ ŏpsə-nīz′ ]


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.