EXAMPLES | WORD ORIGIN noun, plural clo·a·cae . [kloh- ey-see] /kloʊˈeɪ si/ . Zoology 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. a sewer, especially an ancient sewer. Origin of cloaca 1650–60; < Latin clo(u)āca, cluāca sewer, drain; probably akin to Greek klýzein to wash, wash away Related forms clo·a·cal, adjective pre·clo·a·cal, adjective
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for cloacal Historical Examples of cloacal
This surrounds the
cloacal outlet, the latter concealing a double spiculum.
The other pair lies just within the lips of the
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. British Dictionary definitions for cloacal noun plural -cae ( -kiː) a cavity in the pelvic region of most vertebrates, except higher mammals, and certain invertebrates, into which the alimentary canal and the genital and urinary ducts open a sewer Derived Forms cloacal, adjective Word Origin for cloaca
C18: from Latin: sewer; related to Greek
kluzein to wash out
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Origin and History for cloacal n.
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).
Online Etymology Dictionary, © 2010 Douglas Harper
n. In early embryos, the entodermally lined chamber into which the hindgut and allantois empty. The common cavity into which the intestinal, genital, and urinary tracts open in vertebrates such as fish, reptiles, birds, and some mammals. An opening in a diseased bone containing a fragment of dead bone. Related forms clo•a ( ′cal -kəl) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Plural cloacae ( klō-ā) ′sē′ 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 See vent.
The American Heritage® Science Dictionary
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