Bellybutton (noun)

1. The navel or the small depression in the center of the abdomen marking the point of attachment of the umbilical cord.
2. A small, circular protrusion on the surface of an object, usually used as a handle or grip.

Origin:

The word "bellybutton" is a compound word made up of "belly" and "button" and refers to the navel or the small depression in the center of the abdomen marking the point of attachment of the umbilical cord.

Examples:

1. She gently traced her finger around her baby's bellybutton.
2. He had an outie bellybutton instead of an innie.
3. The bellybutton is a sensitive spot on the body.
4. The jar had a bellybutton on the lid for easy opening.
5. Bellybutton piercing is a popular form of body modification.