Conjoined twins united in the region of the xiphoid process of the sternum. See conjoined twins, under twin. [xipho- + G. pagos, something fixed]
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xi·phop·a·gus zī-'fäp-ə-gəs n congenitally joined twins united at the xiphoid process
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xi·phop·a·gus (zi-fopґ-) (zĭ-fopґə-gəs) [xipho- + -pagus] symmetrical conjoined twins fused in the region of the xiphoid process.Medical dictionary. 2011.