ilioxiphopagus

Conjoined twins in which the fusion extends from the xiphoid to the iliac region. See conjoined twins, under twin. [ilio- + xiphoid, + G. pagos, fixed]

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il·io·xi·phop·a·gus (il″e-o-zi-fopґə-gəs) symmetrical conjoined twins fused from the pelvis to the xiphoid process.