Umbilicus may refer to:
*The
navel
The navel (clinically known as the umbilicus, commonly known as the belly button or tummy button) is a protruding, flat, or hollowed area on the abdomen at the attachment site of the umbilical cord. All placental mammals have a navel, although ...
or belly button
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Umbilicus (mollusc)
The umbilicus of a shell is the axially aligned, hollow cone-shaped space within the whorls of a coiled mollusc shell. The term umbilicus is often used in descriptions of gastropod shells, i.e. it is a feature present on the ventral (or under) si ...
, a feature of gastropod, Nautilus and Ammonite shell anatomy
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''Umbilicus'' (plant), a genus of over ninety species of perennial flowering plants
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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
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Umbilicus mundi
An omphalos is a religious stone artifact, or baetylus. In Ancient Greek, the word () means "navel". Among the Ancient Greeks, it was a widespread belief that Delphi was the center of the world. According to the myths regarding the founding of ...
, or "the world's navel", a Greek artifact
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