'bellybutton' definitions:

Definition of 'bellybutton'

From: WordNet
noun
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" [syn: navel, umbilicus, bellybutton, belly button, omphalos, omphalus]

Definition of 'bellybutton'

From: GCIDE
  • bellybutton \bel"ly*but`ton\, belly button \bel"ly but`ton\, n. The depression in the middle of the abdomen in humans left as a residue of the umbilical cord; the umbilicus; the navel[1]. [PJC]