a scar where the umbilical cord was attached
"you were not supposed to show your navel on television"
"they argued whether or not Adam had a navel"
"she had a tattoo just above her bellybutton"
the center point or middle of something
"the Incas believed that Cuzco was the navel of the universe"
The indentation or bump remaining in the abdomen of mammals where the umbilical cord was attached before birth.
"After the baby girl was born, she proudly showed us her tiny navel."
The word comes from Old English nafola, which traces back to a Proto-Indo-European root meaning "navel." This original sense referred to the central hub or center point.