microchemomechanical

The story

1. Proto-Indo-European*mey-der.?
2. Ancient Greekμῑκρός (mīkrós)
3. Ancient Greekμῑκρο- (mīkro-)
4. Englishmicro-
5. Proto-Indo-European*ǵʰew-
6. Ancient Greekχῠ́μᾰ (khŭ́mă)
7. Ancient Greekχυμείᾱ (khumeíā)
8. Arabicالْكِيمِيَاء (al-kīmiyāʔ)
9. Medieval Latinalchēmia
10. Ancient Greekχυμείᾱ (khumeíā)influ.
11. New Latinchēmīa
12. Englishchemo-
13. Proto-Indo-European*megʰ-der.?
14. Ancient Greekμηχανή (mēkhanḗ)
15. Ancient Greekμηχανικός (mēkhanikós)
16. Latinmēchanicus
17. Old Frenchmecanique
18. Middle Englishmechanic
19. Proto-Indo-European*h₂el-
20. Proto-Indo-European*h₂élisder.?
21. Middle Englishmechanical
22. Englishmechanical
23. Englishchemomechanical
24. English todaymicrochemomechanical

From micro- + chemomechanical.