nombril

/ˈnɑmbrɪl/
noun
  1. The center point of a shield or escutcheon in heraldry, located halfway between the top and bottom.
    • In heraldry, the nombril is also called the navel point.
    • The family crest placed a star at the nombril of the shield.
    • The lion was depicted at the nombril of the coat of arms.