Etymology

autoprotolysis

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Today it means: The autoionization of water (or similar compounds) in which a proton (hydrogen ion) is transferred to form a cation and an anion e.g. 2H₂O => H₃O⁺ + OH⁻ Full definition →

English protolysis ← Ancient Greek αὐτο- (auto-) ← Proto-Indo-European *h₂ew
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The story

  1. Proto-Hellenic*autós
  2. Proto-Indo-European*h₂ew
  3. Ancient Greekαὖ (aû)
  4. Ancient Greekτόν (tón)
  5. Ancient Greekαὐτός (autós)
  6. Ancient Greekαὐτο- (auto-)
  7. Englishauto-
  8. Englishprotolysis
  9. English todayautoprotolysis

From auto- + protolysis.

Etymology from Wiktionary, CC BY-SA 4.0.