[clo.a.ca] n, pl -a.cae [L; akin to Gk klyzein to wash--more at clyster] (1599) 1: [3]sewer
2. [NL, fr. L]: the common chamber into which the intestinal, urinary, and generative canals discharge in birds, reptiles, amphibians, and many fishes; also: a comparable chamber of an invertebrate -- clo.a.cal adj