radiochemical

The story

1. Latinradius
2. Englishradio-
3. Proto-Indo-European*ǵʰew-
4. Ancient Greekχῠ́μᾰ (khŭ́mă)
5. Ancient Greekχυμείᾱ (khumeíā)
6. Arabicالْكِيمِيَاء (al-kīmiyāʔ)
7. Medieval Latinalchēmia
8. Ancient Greekχυμείᾱ (khumeíā)influ.
9. New Latinchēmia
10. New Latinchēmicus
11. Proto-Indo-European*h₂el-
12. Proto-Indo-European*h₂élisder.?
13. Englishchemical
14. English todayradiochemical

From radio- + chemical.