vermiform appendix

from WordNet (r) 3.0 (2006)

vermiform appendix
    n 1: a vestigial process that extends from the lower end of the
         cecum and that resembles a small pouch [syn: {appendix},
         {vermiform appendix}, {vermiform process}, {cecal
         appendage}]

from The Collaborative International Dictionary of English v.0.48

Vermiform \Ver"mi*form\, a. [L. vermis a worm + -form.]
   Resembling a worm in form or motions; vermicular; as, the
   vermiform process of the cerebellum.
   [1913 Webster]

   {Vermiform appendix} (Anat.), a slender blind process of the
      caecum in man and some other animals; -- called also
      {vermiform appendage}, and {vermiform process}. Small
      solid bodies, such as grape seeds or cherry stones,
      sometimes lodge in it, causing serious, or even fatal,
      inflammation. See Illust. under {Digestion}.
      [1913 Webster]