sphenoccipital

sphe·no·bas·i·lar

(sfē'nō-bas'i-lăr),
Relating to the sphenoid bone and the basilar process of the occipital bone.

sphenoccipital

(sfē″nŏk-sĭp′ĭ-tăl) [″ + L. occipitalis, occipital]
Pert. to the sphenoid and occipital bones.