biodiagnostics

The story

1. Proto-Indo-European*gʷeyh₃-
2. Ancient Greekβῐ́ος (bĭ́os)
3. Ancient Greekβῐο- (bĭo-)
4. Englishbio-
5. Proto-Indo-European*dwóh₁
6. Proto-Indo-European*trísinflu.
7. Proto-Indo-European*dwís
8. Ancient Greekδιά (diá)
9. Ancient Greekδια- (dia-)
10. Proto-Indo-European*ǵneh₃-
11. Proto-Indo-European*ǵn̥h₃sḱéti
12. Proto-Hellenic*gignṓskō
13. Ancient Greekγῐγνώσκω (gĭgnṓskō)
14. Ancient Greekδῐαγῐγνώσκω (dĭagĭgnṓskō)
15. Ancient Greekδῐᾰ́γνωσῐς (dĭắgnōsĭs)
16. Ancient Greekδῐᾰ- (dĭă-)
17. Proto-Indo-European*ǵneh₃-
18. Proto-Indo-European*ǵneh₃tis
19. Ancient Greekγνῶσις (gnôsis)
20. Ancient Greekγνωστῐκός (gnōstĭkós)
21. Ancient Greekδῐαγνωστῐκός (dĭagnōstĭkós)
22. Englishdiagnostic
23. Englishdiagnostics
24. English todaybiodiagnostics

From bio- + diagnostics.