steroidal

The story

1. Proto-Indo-European*ǵʰelh₃-
2. Proto-Hellenic*kʰolā́
3. Ancient Greekχολή (kholḗ)
4. Proto-Indo-European*ster-
5. Ancient Greekστερεός (stereós)
6. Frenchcholestérine
7. Frenchcholestéro
8. Englishcholesterol
9. Englishsterol
10. Proto-Indo-European*weyd-
11. Proto-Indo-European*wéydos
12. Proto-Hellenic*wéidos
13. Ancient Greekεἶδος (eîdos)
14. Englishsteroid
15. Proto-Indo-European*h₂el-
16. Proto-Indo-European*h₂élisder.?
17. English todaysteroidal

From steroid + -al.