Abdo'men n.s. [Lat. from abdo, to hide.] A cavity commonly called the lower venter or belly: It contains the stomach, guts, liver, spleen, bladder, and is within lined with a membrane called the peritonæum. The lower part is called the hypogastrium; the foremost part is divided into the epigastrium, the right and left hypochondria, and the navel; 'tis bounded above by the cartilago ensiformis and the diaphragm, sideways by the short or lower ribs, and behind by the vertebræ of the loins, the bones of the coxendix, that of the pubes and os sacrum. It is covered with several muscles, from whose alternative relaxations and contractions in respiration, digestion is forwarded, and the due motion of all the parts therein contained promoted, both for secretion and expulsion. Quincy
The abdomen consists moreover of parts containing and contained. Wiseman's Surgery.