(rā'kē-op'ă-gŭs), Conjoined twins united back to back with union of their spinal columns. See: conjoined twins. Synonym(s): rachipagus [rachio- + G. pagos, something fixed]
rachiopagus
(rā″kē-ŏp′ă-gŭs) [″ + pagos, thing fixed] A conjoined twin deformity in which the two are joined at the vertebral column.