umbilicus
nounUK /ʌmˈbɪlɪkəs/
US /ʌmˈbɪlɪkəs/
The umbilicus is the small mark in the middle of your belly where your belly button is.
The doctor gently pressed on the baby's umbilicus to check that it was healing well.
SYNONYMS
OTHER MEANINGS
2. In botany, the umbilicus is the small point on a seed where it was attached to the plant.
The seed's umbilicus showed where it had once joined the pod.
3. In biology, the umbilicus can be a small opening or depression, such as the center of a snail shell.
The spiral shell coiled tightly around its umbilicus.
4. In geometry, an umbilicus is a point on a curved surface where all directions curve equally.
The mathematician marked the umbilicus on the surface of the sphere.