Etymology

secosteroid

Sec·o·ster·oid
S1E1C3O1S1T1E1R1O1I1D2

Today it means: Any of the subclass of many terpenoid compounds of the tetracyclic steroid class that are structural relatives bearing a cleavage of one of the four rings of that parent class. The prototypical secosteroid is cholecalciferol, vitamin D3. Full definition →

English steroid ← Ancient Greek εἶδος (eîdos) ← Proto-Hellenic *wéidos
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The story

  1. Proto-Indo-European*sek-
  2. Proto-Indo-European*sékh₁yeti
  3. Proto-Italic*sekaō
  4. Latinsecō
  5. Proto-Indo-European*ǵʰelh₃-
  6. Proto-Hellenic*kʰolā́
  7. Ancient Greekχολή (kholḗ)
  8. Proto-Indo-European*ster-
  9. Ancient Greekστερεός (stereós)
  10. Frenchcholestérine
  11. Frenchcholestéro
  12. Englishcholesterol
  13. Englishsterol
  14. Proto-Indo-European*weyd-
  15. Proto-Indo-European*wéydos
  16. Proto-Hellenic*wéidos
  17. Ancient Greekεἶδος (eîdos)
  18. Englishsteroid
  19. English todaysecosteroid

From Latin secō (“to cut”) + English steroid.

Etymology from Wiktionary, CC BY-SA 4.0.