1. The region of the body of a vertebrate between the thorax and the pelvis
   "He did sit-ups to strengthen his abdomen";
   - venter, stomach, belly
    
2. The cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm
   "The abdomen houses organs such as the liver, stomach, and intestines";
   - abdominal cavity

Derived forms: abdomens

Type of: bodily cavity, body part, cavity, cavum

Part of: body, torso, trunk

Encyclopedia: Abdomen, acute