os coxae
/ˌɒs ˈkɒksiː/Anatomy and Zoology
noun
The large, irregularly shaped bone of the pelvic girdle consisting of the fused ilium, ischium, and pubis; the hip bone.
Origin
Mid 17th century; earliest use found in Alexander Read (1586?–1641). From post-classical Latin os coxae from classical Latin os + coxae, genitive of coxa.