the sink(s) of the body: the organs of digestion and excretion. Obsolete.
the digestive or gastrointestinal tract.
The intestines or gut, esp. of an invertebrate or embryo. Also in plural.
The digestive system; the alimentary tract. Also in plural in same sense.
Any part of the alimentary canal; spec. the pharynx and oesophagus. Cf. airway, n. 1b.