First Known Use: 1903
Dictionary
opsonin
noun op·so·nin \ˈäp-sə-nən\
Definition of OPSONIN
: any of various proteins (as antibodies or complement) that bind to foreign particles and cells (as bacteria) making them more susceptible to the action of phagocytes
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Origin of OPSONIN
Latin opsonare to buy provisions, cater (from Greek opsōnein) + English 1-in — more at oligopsony
Medical Dictionary
opsonin
noun op·so·nin \ˈäp-sə-nən\
Medical Definition of OPSONIN
: any of various proteins (as complement or antibodies) that bind to foreign particles and microorganisms (as bacteria) making them more susceptible to the action of phagocytes
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