umbilicus

1. A navel.

2. (broadly, proscribed, sometimes)A umbilical cord.

   a scar where the umbilical cord was attached

3. A hilum.

4. A depression or opening in the center of the base of many spiral shells.

5. Either of the two apertures in the calamus of a feather.

6. A tube connecting an astronaut or spacecraft to the mothership, through which supplies and samples can be transferred.

7. A point of a surface at which the curvatures of the normal sections are all equal to each other.

   A sphere may be osculatory to the surface in every direction at an umbilicus.

8. (historical)An ornamented or painted ball or boss fastened at each end of the stick on which manuscripts were rolled.

9. (obsolete)One of the foci of an ellipse or other curve.

1. A tiny hernia was visible near the infant's umbilicus.

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2. The surgeon made a small incision just below the umbilicus.

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3. Dr. Mohammed-Abdi noticed a mild discharge from the umbilicus and ordered further tests.

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