bioactivator

The story

1. Proto-Indo-European*gʷeyh₃-
2. Ancient Greekβῐ́ος (bĭ́os)
3. Ancient Greekβῐο- (bĭo-)
4. Englishbio-
5. Proto-Indo-European*h₂eǵ-
6. Proto-Indo-European*h₂éǵeti
7. Proto-Italic*agō
8. Latinagō
9. Ancient Greekἐνεργητικός (energētikós)
10. Latināctīvu
11. Old Frenchactif
12. Middle Englishactyf
13. Englishactive
14. Englishactivate
15. Englishactivator
16. English todaybioactivator

From bio- + activator.