Referring to the underside, or belly of an organism, typically for vertebrates.
One of several bones that comprise the vertebral column, or backbone, in vertebrates. The Plural form of vertebra is vertebrae (pronounced verteBREE).
Any animal that has a vertebral column. Contrasted with invertebrate.
In a developing blastula, the end that has the higher concentration of yolk.
The organs of the body contained in the abdomen, such as the intestines, stomach, and liver.