Etymology

hydantoin

H4Y4D2A1N1T1O1I1N1

Today it means: The heterocycle imidazolidine-2,4-dione derived from urea and glycolic acid; any of its many derivatives Full definition →

English allantoin ← Ancient Greek ᾰ̓λλᾶς (ăllâs) ← French hydrogène
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The story

  1. Proto-Indo-European*wed-
  2. Proto-Indo-European*wódr̥
  3. Proto-Hellenic*údōr
  4. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
  5. Ancient Greekὑδρο- (hudro-)
  6. Frenchhydro-
  7. Proto-Indo-European*ǵenh₁-
  8. Proto-Indo-European*ǵénh₁os
  9. Proto-Hellenic*génos
  10. Ancient Greekγένος (génos)
  11. Frenchhydrogène
  12. Englishhydrogen
  13. Englishhydrogenation
  14. Ancient Greekᾰ̓λλᾶς (ăllâs)
  15. Englishallanto-
  16. Englishallantoin
  17. English todayhydantoin

From hydrogenation and allantoin.

Etymology from Wiktionary, CC BY-SA 4.0.