\C[ae]"cum\, n.; pl. {C[ae]cums}, L. {C[ae]ca}. [L.
caecus blind, invisible, concealed.] (Anat.)
(a) A cavity open at one end, as the blind end of a canal or
    duct.
(b) The blind part of the large intestine beyond the entrance
    of the small intestine; -- called also the {blind gut}.
Note: The c[ae]cum is comparatively small in man, and ends in
      a slender portion, the vermiform appendix; but in
      herbivorous mammals it is often as large as the rest of
      the large intestine. In fishes there are often numerous
      intestinal c[ae]ca.