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
2.
a sewer
Derived forms
cloacal (cloˈacal) or cloacaline (cloˈacaline) or cloacinal (ˌcloaˈcinal)
adjective
Word origin
C18: from Latin: sewer; related to Greek kluzein to wash out