noun, plural clo·a·cae [kloh-ey-see] /kloʊˈeɪ si/.
- 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
Examples from the Web for cloacal
Historical Examples of cloacal
This surrounds the cloacal outlet, the latter concealing a double spiculum.Parasites
T. Spencer Cobbold
The other pair lies just within the lips of the cloacal opening.
Cl, Cloacal or pallial chamber of Neomeniae and Chaetoderma.
The segmental ducts in the larv open behind into the cloacal section of the alimentary tract.
It gives rise to the cloacal and intestinal part of the alimentary tract.
noun plural -cae (-kiː)
Word Origin for cloaca
1650s, euphemism for "underground sewer," from Latin cloaca "public sewer, drain," from cluere "to cleanse," from PIE root *kleue- "to wash, clean" (cf. Greek klyzein "to dash over, wash off, rinse out," klysma "liquid used in a washing;" Lithuanian šluoju "to sweep;" Old English hlutor, Gothic hlutrs, Old High German hlutar, German lauter "pure, clear"). Use in biology, in reference to eliminatory systems of lower animals, is from 1834. Related: Cloacal (1650s); cloacinal (1857).