Etymology

hexafluronium

H4E1X8A1F4L1U1R1O1N1I1U1M3

Today it means: A muscle relaxant that acts as a nicotinic acetylcholine receptor antagonist. Full definition →

English onium ← New Latin ammōnium ← Ancient Greek ῡ̔́λη (hū́lē)
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The story

  1. Proto-Indo-European*swéḱs
  2. Proto-Hellenic*hwéks
  3. Ancient Greekἕξ (héx)
  4. Ancient Greekἑξα- (hexa-)
  5. Latinhexa-
  6. Englishhexa-
  7. Englishhex-
  8. Englishhexane
  9. Englishfluorene
  10. Proto-Indo-European*swel-der.?
  11. Ancient Greekῡ̔́λη (hū́lē)
  12. Englishfluorenyl
  13. New Latinammōnium
  14. Englishammonium
  15. Englishonium
  16. English todayhexafluronium

From hexa(ne) + flu(o)r(enyl) + -onium (“quaternary ammonium compound”).

Etymology from Wiktionary, CC BY-SA 4.0.