immunocytochemistry

The story

1. Proto-Indo-European*mey-
2. Proto-Indo-European*moy-nós
3. Proto-Italic*moinos
4. Latinmūnus
5. Proto-Indo-European*né
6. Proto-Indo-European*n̥-
7. Proto-Italic*n̥-
8. Latinin-
9. Latinin- -is
10. Latinimmūnis
11. Middle Frenchimmun
12. Englishimmune
13. Englishimmuno-
14. Ancient Greekκύτος (kútos)
15. Englishcyto-
16. Proto-Indo-European*ǵʰew-
17. Ancient Greekχῠ́μᾰ (khŭ́mă)
18. Ancient Greekχυμείᾱ (khumeíā)
19. Arabicالْكِيمِيَاء (al-kīmiyāʔ)
20. Medieval Latinalchēmia
21. Ancient Greekχυμείᾱ (khumeíā)influ.
22. New Latinchimia
23. Middle Frenchchymie
24. Frenchchimie
25. Frenchchimiste
26. Englishchemist
27. Englishchemistry
28. Englishcytochemistry
29. English todayimmunocytochemistry

From immuno- + cytochemistry.