peroneus longus
/pɛrə(ʊ)ˌniːəs ˈlɒŋɡəs/(also peronaeus longus) Anatomy and Zoology
noun
A muscle of the lateral side of the leg which arises from the fibula, inserts on to the cuneiform and first metatarsal bones via a long tendon passing under the foot, and serves to extend the ankle and evert the foot.
Origin
Late 17th century. From scientific Latin peroneus longus from post-classical Latin peroneus + classical Latin longus.