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xi·pho·cos·tal .zī-fə-'käs-təl, .zif-ə- adj of, relating to, or connecting the xiphoid process and the ribs
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xipho·cos·tal (zi″fo-) (zif″o-kosґtəl) [xipho- + costal] pertaining to the xiphoid process and the ribs.Medical dictionary. 2011.