opsonin

UK:**UK and possibly other pronunciationsUK and possibly other pronunciations/ˈɒpsənɪn/US:USA pronunciation: respellingUSA pronunciation: respelling(op′sə nin)


WordReference Random House Unabridged Dictionary of American English © 2026
op•so•nin  (op′sə nin),USA pronunciation n. [Immunol.]
  1. Immunologya constituent of normal or immune blood serum that makes invading bacteria more susceptible to the destructive action of the phagocytes.
  • Greek opsōnía, derivative of opsōneîn to buy provisions) + -in2
  • Latin opsōn(ium) victuals (
  • 1900–05
op′so•noid′, adj. 

Collins Concise English Dictionary © HarperCollins Publishers::
opsonin /ˈɒpsənɪn/ n
  1. a constituent of blood serum that renders invading bacteria more susceptible to ingestion by phagocytes in the serum
Etymology: 20th Century: from Greek opsōnion victualsopsonic /ɒpˈsɒnɪk/ adj
'opsonin' also found in these entries (note: many are not synonyms or translations):
opsonic - opsonify

Forum discussions with the word(s) "opsonin" in the title:


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