Definitions for abdominal cavity
abdominal cavity, abdomen(noun)
the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm
The hollow portion of the torso within the abdomen, containing the abdominal organs, in mammals below the diaphragm.
U.S. National Library of Medicine
The region in the abdomen extending from the thoracic DIAPHRAGM to the plane of the superior pelvic aperture (pelvic inlet). The abdominal cavity contains the PERITONEUM and abdominal VISCERA, as well as the extraperitoneal space which includes the RETROPERITONEAL SPACE.
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