craniorachischisis

cra·nio·ra·chis·chi·sis .krā-nē-(.)ō-rə-'kis-kə-səs n, pl -chi·ses -.sēz a congenital fissure of the skull and spine

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cra·nio·ra·chis·chi·sis (kra″ne-o-rə-kisґkĭ-sis) [cranio- + rhachis + schisis fissure] a developmental anomaly consisting of fissure of the cranium and vertebral column; see cranium bifidum and spina bifida.