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
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for opsonize


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

opsonize in Medicine




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.