erythrodifferentiation

The story

1. Proto-Indo-European*h₁rewdʰ-
2. Proto-Indo-European*h₁rudʰrós
3. Proto-Hellenic*erutʰrós
4. Ancient Greekἐρῠθρός (erŭthrós)
5. Englisherythro-
6. Proto-Indo-European*dwóh₁
7. Proto-Indo-European*trísinflu.
8. Proto-Indo-European*d(w)is-
9. Proto-Italic*dis-
10. Latindis-
11. Proto-Indo-European*bʰer-
12. Proto-Indo-European*bʰéreti
13. Proto-Italic*ferō
14. Latinferō
15. Latindifferō
16. Latindifferēns
17. Latindifferentia
18. New Latindifferentiō
19. New Latindifferentiātus
20. Englishdifferentiate
21. Englishdifferentiation
22. English todayerythrodifferentiation

From erythro- + differentiation.