Xiphisternum

‖Xiph″i‐ster″num (?), n.; pl.Xiphisterna (#). [NL., fr. Gr. ξίφοσ a sword + sternum.] (Anat.) (a) The posterior segment, or extremity, of the sternum; — sometimes called metasternum, ensiform cartilage, ensiform process, or xiphoid process. (b) The xiphiplastron. — Xiph″i‐ster″nal (#) a.