osteodifferentiation

The story

1. Proto-Indo-European*h₃ésth₁
2. Ancient Greekὀστέον (ostéon)
3. Englishosteo-
4. Proto-Indo-European*dwóh₁
5. Proto-Indo-European*trísinflu.
6. Proto-Indo-European*d(w)is-
7. Proto-Italic*dis-
8. Latindis-
9. Proto-Indo-European*bʰer-
10. Proto-Indo-European*bʰéreti
11. Proto-Italic*ferō
12. Latinferō
13. Latindifferō
14. Latindifferēns
15. Latindifferentia
16. New Latindifferentiō
17. New Latindifferentiātus
18. Englishdifferentiate
19. Englishdifferentiation
20. English todayosteodifferentiation

From osteo- + differentiation.