Umbilicus vs. Navel — What's the Difference?

See navel.

The navel (clinically known as the umbilicus, commonly known as the belly 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.

(Biology) A small opening or depression similar to a navel, as the hollow at the base of the shell of some gastropod mollusks, one of the openings in the shaft of a feather, or the hilum of a seed.

The mark on the surface of the abdomen of mammals where the umbilical cord was attached during gestation. Also called umbilicus.

(anatomy) navel

A central point; a middle.

(botany) hilum

(anatomy) The indentation or bump remaining in the abdomen of mammals where the umbilical cord was attached before birth.

(zoology) A depression or opening in the center of the base of many spiral shells.

The central part or point of anything; the middle.

(zoology) Either of the two apertures in the calamus of a feather.

A navel orange.

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

(historical) An eye on the underside of a carronade for securing it to a carriage.

One of the foci of an ellipse or other curve.

A mark or depression in the middle of the abdomen; the umbilicus; called also belly button in humans. See Umbilicus.

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

The central part or point of anything; the middle.

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

An eye on the under side of a carronade for securing it to a carriage.

The depression, or mark, in the median line of the abdomen, which indicates the point where the umbilical cord separated from the fetus; the navel; the belly button, in humans.

Scar where the umbilical cord was attached

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

The center point or middle of something

The hilum.

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

One of the foci of an ellipse, or other curve.

Scar where the umbilical cord was attached