opisthionasial

o·pis·thi·o·na·si·al

(ō-pis'thē-ō-nā'zē-ăl),
Relating to the opisthion and nasion; denoting the distance between the two points.

opisthionasial

(ō-pĭs″thē-ō-nā′zē-ăl)
Pert. to the opisthion and nasion of the skull.