Belly button

navel, location on the abdomen where the umbilical word was attached before birth

Distinguish from naval (i.e., relating to a navy). The navel, also called a belly button, or umbilicus, is a scar on the abdomen, caused when the umbilical cord is removed from a newborn baby. All placental mammals have a navel. While it is fairly conspicuous in humans, in most mammals it appears only as a thin hairless line.
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The navel or umbilicus. The one-time site of attachment of the umbilical cord. The term "belly button" was coined around 1877.

belly-button
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