a rounded or swollen, often hollow, anatomical structure, e.g.:
the abdomen or belly of a vertebrate animal
the enlarged thick or fleshy part of a muscle
a broad smooth shallow inward-curving surface, esp of a bone
the swollen base of an archegonium (female sex organ in a moss, fern, etc) in which the egg cell develops
in law, a wife or mother considered as a source of offspring
[Latin venter belly, womb]