The cavity of the belly, which is lined by the peritoneum, and contains the viscera; often restricted in humans to the part between the diaphragm and the commencement of the pelvis, the remainder being called the pelvic cavity.
The posterior section of the body, behind the thorax, in insects, crustaceans, and other Arthropoda.
The belly, or that part of the body between the thorax and the pelvis, not including the back; or in some lower vertebrates, the portion between the cardiac and caudal regions.
The intestines.
The concept or quality that defines something at its very core.
The deepest or innermost part.
Compassion, sympathy.