sphenoid

The story

1. Ancient Greek · derived fromσφηνοειδής“wedge-shaped”
2. New Latin · derived fromsphenoides
3. English todaysphenoid

From New Latin sphenoides, from Ancient Greek σφηνοειδής (sphēnoeidḗs, “wedge-shaped”), from σφήν (sphḗn, “wedge”) + -ειδής (-eidḗs, “-form, -like”).