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.
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.