- Anatomy, Zoology.
- the part of the body of a mammal between the thorax and the pelvis; belly.
- the cavity of this part of the body containing the stomach, intestines, etc.
- (in nonmammalian vertebrates) a region of the body corresponding to, but not coincident with, this part or cavity.
- the posterior section of the body of an arthropod, behind the thorax or the cephalothorax.
- the region of the body of a vertebrate that contains the viscera other than the heart and lungs. In mammals it is separated from the thorax by the diaphragm
- the front or surface of this region; belly
- (in arthropods) the posterior part of the body behind the thorax, consisting of up to ten similar segments
