Difference between Umbilicus and Navel

Umbilicus

Part of speech: noun

Definition: navel

Navel

Part of speech: noun

Definition: The indentation or bump remaining in the abdomen of mammals where the umbilical cord was attached before birth.

Example sentence: I think there's nothing worse than inertia. You can be inert and study your navel, and gradually fall off the chair. I think the key is to keep flying.