Opsonin

//ˈɒpsənɪn// noun

Definitions

Noun
  1. 1
    Any chemical produced by the body, including antibodies and complement proteins, that causes a pathogen to be more susceptible to phagocytosis.
  2. 2
    an antibody in blood serum that attaches to invading microorganisms and other antigens to make them more susceptible to the action of phagocytes wordnet

Etymology

From Ancient Greek ὀψωνέω (opsōnéō, “to purchase provisions, to buy victuals, to cater”) + -in.

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