Science Dictionary
cloaca   (klō-ā'kə)  Pronunciation Key 
Plural cloacae (klō-ā'sē')
  1. The body cavity into which the intestinal, urinary, and genital canals empty in birds, reptiles, amphibians, most fish, and monotremes. The cloaca has an opening for expelling its contents from the body, and in females it serves as the depository for sperm. Also called vent.

  2. See vent.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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