cloaca

The Thames, polluted with the filthy effusions of the cloacae.

In birds the rectum, at the termination of its canal, forms an oval or elongated pouch […] and then expands into a cavity, which has been named cloaca.

To every house […] a cloaca.

Across this shell [sc. of bone] small holes are eaten, by which the matter escapes, and which are called cloacae (Weidmann).