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opsonin

American  
[op-suh-nin] / ˈɒp sə nɪn /

noun

Immunology.
  1. a constituent of normal or immune blood serum that makes invading bacteria more susceptible to the destructive action of the phagocytes.


opsonin British  
/ ɒpˈsɒnɪk, ˈɒpsənɪn /

noun

  1. a constituent of blood serum that renders invading bacteria more susceptible to ingestion by phagocytes in the serum

"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

Other Word Forms

Etymology

Origin of opsonin

1900–05; < Latin opsōn ( ium ) victuals (< Greek opsōnía, derivative of opsōneîn to buy provisions) + -in 2

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A clathrin coating enhances phagocytosis, whereas opsonin reverses the process of phagocytosis.

From Textbooks • Jun. 9, 2022

The "opsonin," or "relish," is something exuded into or produced in the blood fluid when the attacking microbe arrives.

From More Science From an Easy Chair by Lankester, E. Ray (Edwin Ray), Sir

The opsonin is simple rot, as any capable surgeon can tell you; but we're all delighted to see your personal qualities officially recognized.

From The Doctor's Dilemma by Shaw, Bernard

Send a drop of the patient's blood to the laboratory at St. Anne's; and in fifteen minutes I'll give you his opsonin index in figures.

From The Doctor's Dilemma by Shaw, Bernard

By the time this preface is in print the kaleidoscope may have had another shake; and opsonin may have gone the way of phlogiston at the hands of its own restless discoverer.

From The Doctor's Dilemma: Preface on Doctors by Shaw, Bernard

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