occipitoatloid

oc·cip·i·to·at·loid

(ok-sip'i-tō-at'loyd),
Relating to the occipital bone and atlas; denoting the articulation between the two bones.

occipitoatloid

(ŏk-sĭp″ĭ-tō-ăt′loyd)
Concerning the occipital and atlas bones.