The story
- Proto-Indo-European*ḱekʷ-
- Proto-Indo-European*ḱókʷr̥
- Proto-Indo-European*ḱókʷ-ro-s
- Ancient Greekκόπρος (kópros)
- Englishcopro-
- GermanPorphyrin
- Englishporphyrin
- Proto-Indo-European*ǵenh₁-
- Proto-Indo-European*ǵénh₁os
- Proto-Hellenic*génos
- Ancient Greekγένος (génos)
- Englishporphyrinogen
- English todaycoproporphyrinogen
From copro- + porphyrinogen.
Etymology from Wiktionary, CC BY-SA 4.0.