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