xiphoid process /zif′oid/ [Gk, xiphos + eidos, form; L, processus, going forth] , the smallest of three parts of the sternum, articulating with the inferior end of the body of the sternum above and laterally with the seventh rib. Several muscles of the abdominal wall are attached to the xiphoid process, including the rectus abdominis. Also called ensiform cartilage, ensiform process, xiphisternum, xiphoid, xiphoid appendix. Compare manubrium.