Etymology

diamondoid

D2I1A1M3O1N1D2O1I1D2

Today it means: Any of several polycyclic hydrocarbons whose cagelike structure resembles part of the diamond crystal lattice. Full definition →

Ancient Greek εἶδος (eîdos) ← Proto-Hellenic *wéidos ← Proto-Indo-European *wéydos
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Hellenic*ə-
  4. Ancient Greekἀ- (a-)?
  5. Proto-Indo-European*demh₂-
  6. Ancient Greekδαμνάω (damnáō)?
  7. Ancient Greekἀδάμας (adámas)
  8. Latinadamās
  9. Late Latindiamās
  10. Old Frenchdiamant
  11. Middle Englishdyamaunt
  12. Englishdiamond
  13. Proto-Indo-European*weyd-
  14. Proto-Indo-European*wéydos
  15. Proto-Hellenic*wéidos
  16. Ancient Greekεἶδος (eîdos)
  17. English todaydiamondoid

From diamond + -oid.

Etymology from Wiktionary, CC BY-SA 4.0.