Where does “œsophagien” come from?

œsophagien (French) comes from French œsophage, from Ancient Greek οἰσοφάγος, from Ancient Greek οἰσέμεν, from Ancient Greek φέρω, from Proto-Hellenic pʰérō, from Proto-Indo-European bʰéreti, from Proto-Indo-European bʰēr- — shiny, light brown.

œsophagien (French): esophageal