头颅的

Australopithecus had an apish cranium.

南方古猿有像无尾猿的头。

Orbital meningocele is a rare congenital anomaly with cystic herniation of meninges caused by a bony defect of the cranio-orbital bone.

眼窝脑膜膨出是种罕见的先天性异常，其成因为头或眼窝骨的损使得脑脑从损处呈囊状的膨出。