diphosphatidylglycerol

The story

1. Proto-Indo-European*dwóh₁
2. Proto-Indo-European*dwi-
3. Proto-Hellenic*dwi-
4. Ancient Greekδῐ- (dĭ-)
5. Latindi-
6. Englishdi-
7. Proto-Indo-European*bʰeh₂-
8. Proto-Indo-European*bʰéh₂os
9. Proto-Hellenic*pʰáwos
10. Ancient Greekφᾰ́ος (phắos)
11. Ancient Greekφῶς (phôs)
12. Proto-Indo-European*bʰer-
13. Proto-Indo-European*bʰéreti
14. Proto-Hellenic*pʰérō
15. Ancient Greekφέρω (phérō)
16. Ancient Greekφωσφόρος (phōsphóros)
17. Latinphōsphorus
18. Frenchphosphore
19. Frenchphosphate
20. Englishphosphate
21. Proto-Indo-European*dʰeh₁-
22. Englishphosphatide
23. Englishphosphatidate
24. Proto-Indo-European*swel-der.?
25. Ancient Greekῡ̔́λη (hū́lē)
26. Englishphosphatidyl
27. Ancient Greekγλῠκερός (glŭkerós)
28. Frenchglycérine
29. Englishglycerine
30. Akkadian𒎎𒋆𒁉𒍣𒁕 (guḫlum)
31. Aramaicכוחלא (kuḥlā)
32. Arabicكُحْل (kuḥl)
33. Andalusian Arabicكُحُول (kuḥūl)
34. Medieval Latinalcoho
35. Middle Englishalcofol
36. Englishalcohol
37. Englishglycerol
38. English todaydiphosphatidylglycerol

From di- + phosphatidyl + glycerol.