- the common cavity into which the intestinal, urinary, and generative canals open in birds, reptiles, amphibians, many fishes, and certain mammals.
- a similar cavity in invertebrates.
Origin of cloaca
OTHER WORDS FROM cloacaclo·a·cal, adjectivepre·clo·a·cal, adjective
How to use cloaca in a sentence
The dinosaur owner of this particular cloaca is an approximately 120 million-year-old Psittacosaurus, hailing from what is now the Liaoning province in northeastern China.
For help with their description, Vinther says, the study authors looked to the wide-ranging cloaca of other land-dwelling vertebrates.
The cloaca of birds, our present-day dinosaurs, look “kind of like a cyst that needs to be popped,” Vintehr explains, while the cloaca of crocodile are covered in distinct scales, forming a sort of raised lobe with a slit in the middle.
And some reptiles add a fourth function to the overworked cloacal repository–that of respiration as well.What the Man With No Ass Crack Can Teach Darwinists and Creationists|Kent Sepkowitz|January 14, 2014|DAILY BEAST
Elsewhere the wall of the cloaca and cloacal groove are merely in contact but do not communicate.The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
Figure 5H represents a section through the cloacal region, cl, showing the openings into the cloaca of the Wolffian ducts, wdo.Development of the Digestive Canal of the American Alligator|Albert M. Reese
These muscles belong really to the muscles in connection with the Mllerian and Wolffian ducts and skin, not to the cloacal region.The Origin of Vertebrates|Walter Holbrook Gaskell
The downward prolongation of the segmental duct to join the posterior or cloacal extremity of the alimentary tract (9b).
The figure shews the solid anterior extremity of the cloacal involution.