Umbilicus

Umbilicus may refer to:
 * The navel or belly button
 * Umbilicus (mollusc), a feature of gastropod, Nautilus and Ammonite shell anatomy
 * Umbilicus (plant), a genus of over ninety species of perennial flowering plants
 * Umbilicus urbis Romae, the designated center of the city of Rome from which and to which all distances in Rome and the Roman Empire were measured
 * Umbilicus (reference point), a central point used to plan an Ancient Roman city.
 * Umbilicus mundi, or "the world's navel", a Greek artifact
 * Umbilicus, an American rock band that includes members of death metal bands.