Etymology

iosis

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Today it means: Synonym of rubedo (“reddening process in the alchemical magnum opus”). Full definition →

Ancient Greek ἴωσις
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The story

  1. Ancient Greek · borrowed fromἴωσις
  2. English todayiosis

From Ancient Greek ἴωσις (íōsis), from ἰός (iós, “rust”).

Etymology from Wiktionary, CC BY-SA 4.0.