Xiphoid

from The Collaborative International Dictionary of English v.0.48

Xiphoid \Xiph"oid\ (?; 277), a. [Gr. xifoeidh`s sword-shaped;
   xi`fos a sword + ei`^dos form, shape: cf. F. xiphoide.]
   (Anat.)
   (a) Like a sword; ensiform.
   (b) Of or pertaining to the xiphoid process; xiphoidian.
       [1913 Webster]