Etymology

opsonin

O1P3S1O1N1I1N1

Today it means: Any chemical produced by the body, including antibodies and complement proteins, that causes a pathogen to be more susceptible to phagocytosis. Full definition →

Ancient Greek ὀψωνέω
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The story

  1. Ancient Greek · derived fromὀψωνέω“to purchase provisions, to buy victuals, to cater”
  2. English todayopsonin

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

Etymology from Wiktionary, CC BY-SA 4.0.