Etymology

tricyclo

T1R1I1C3Y4C3L1O1

Today it means: Describing a molecular structure having three rings (either fused, or having a common bridgehead atom) Full definition →

English cyclo- ← Classical Latin cyclicus ← French cyclique
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The story

  1. Proto-Indo-European*tréyes
  2. Proto-Indo-European*tri-
  3. Proto-Italic*tri-
  4. Latintri-
  5. Englishtri-
  6. Proto-Indo-European*kʷelh₁-redup.
  7. Proto-Indo-European*kʷékʷlos
  8. Proto-Hellenic*kʷókʷlos
  9. Proto-Hellenic*kúklos
  10. Ancient Greekκύκλος (kúklos)
  11. Late Latincyclus
  12. Middle Englishcicle
  13. Englishcycle
  14. Ancient Greekκύκλος (kúklos)
  15. Ancient Greekκυκλῐκός (kuklĭkós)
  16. Classical Latincyclicu
  17. Middle Frenchcyclique
  18. Frenchcyclique
  19. Classical Latincyclicus
  20. Englishcyclic
  21. Englishcyclo-
  22. English todaytricyclo

From tri- + cyclo-.

Etymology from Wiktionary, CC BY-SA 4.0.