polysomal

The story

1. Proto-Indo-European*pleh₁-
2. Proto-Indo-European*polh₁ús
3. Ancient Greekπολῠ́ς (polŭ́s)
4. Englishpoly-
5. Proto-Indo-European*tewh₂-
6. Proto-Indo-European*twoH-mn̥
7. Proto-Hellenic*twṓmə?
8. Proto-Indo-European*styeH-
9. Proto-Indo-European*(s)tyoH-mn̥
10. Proto-Hellenic*styṓmə?
11. Ancient Greekσῶμα (sôma)
12. Englishpolysome
13. Proto-Indo-European*h₂el-
14. Proto-Indo-European*h₂élisder.?
15. English todaypolysomal

From polysome + -al.