n.; pl. Cæcums, L. Cæca [ 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. [ Also spelled cecum. ] [ 1913 Webster ]

☞ The cæcum 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 cæca. [ 1913 Webster ]

n. The caecum, the cavity in which the large intestine begins and into which the ileum opens.
Syn. -- caecum, blind gut. [ WordNet 1.5 ]