1. Navel, a first-level Chinese character, is pronounced navel qí.

2. The mark on the belly where the umbilical cord comes off. The umbilical cord is the tube that connects the mother's placenta in the middle of the fetus's stomach to draw nourishment: the navel.

3. The operculum of the crab's abdomen, rounded in females, called the "umbilicus", and pointed in males, called the "pointed umbilicus" [belly flap].

4, some objects in the center of the concave-convex as navel [navel]. Such as: melon navel; navel orange.

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