Etymology

trioxygen

T1R1I1O1X8Y4G2E1N1

Today it means: ozone (the triatomic allotrope of oxygen) Full definition →

English oxygen ← French oxygène ← Ancient Greek γένος (génos)
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The story

  1. Englishtri-
  2. Proto-Indo-European*h₂eḱ-der.?
  3. Ancient Greekὀξύς (oxús)
  4. Proto-Indo-European*ǵenh₁-
  5. Proto-Indo-European*ǵénh₁os
  6. Proto-Hellenic*génos
  7. Ancient Greekγένος (génos)
  8. Frenchoxygène
  9. Englishoxygen
  10. English todaytrioxygen

From tri- + oxygen.

Etymology from Wiktionary, CC BY-SA 4.0.