c[ae]ca
Webster's Dictionary (GCIDE)
caecum \cae"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. [Also spelled cecum.] [1913 Webster]
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. [1913 Webster]