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Pronunciation: klo-a'ka


  1. In early embryos, the endodermally lined chamber into which the hindgut and allantois empty.
  2. In birds and monotremes, the common chamber into which open the hindgut, bladder, and genital ducts.

[L. sewer]

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.