Etymology

disulfide

D2I1S1U1L1F4I1D2E1

Today it means: A functional group with two sulfur atoms bonded to one another, described by the following formula: R–S–S–R'. Full definition →

English sulfide ← Proto-Indo-European *dʰeh₁- ← Middle English sulphur
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The story

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Hellenic*dwi-
  4. Ancient Greekδῐ- (dĭ-)
  5. Latindi-
  6. Englishdi-
  7. Latinsulpur
  8. Latinsulfur
  9. Latinsulphur
  10. Anglo-Normansulfre
  11. Middle Englishsulphur
  12. Englishsulf(ur)
  13. Proto-Indo-European*dʰeh₁-
  14. Englishsulfide
  15. English todaydisulfide

From di- + sulfide.

Etymology from Wiktionary, CC BY-SA 4.0.