Umbilicus

Umbilicus may refer to:

• Umbilicus (mollusc), a feature of gastropod, Nautilus and Ammonite shell anatomy
• Umbilicus, a synonym for the navel or belly button
• Umbilicus (genus), a genus of over ninety species of perennial flowering plants, including:
  • Umbilicus rupestris, the binomial name for navelwort
  • Umbilicus horizontalis, the binomial name for horizontal navelwort
  • Umbilicus intermedius, the binomial name for intermediate navelwort
  • Umbilicus chrysanthus, the binomial name for Venus' navel
  • Umbilicus chloranthus, the binomial name for green Venus' navel
  • Umbilicus erectus, the binomial name for reniform Venus' navel
  • Umbilicus oppositifolius, the binomial name for gold drop
• 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 mundi, or "the world's navel", a Greek artifact