umbilicate

Having a central mark or depression resembling a navel.

Having a navel.

To become umbilicate.

Shaped like a navel; resembling a navel, as being round and depressed or concave, or as being focal or central, as some pit or depression; umbilicated; umbiliform.

Having an umbilicus or umbilicated formation, as a shell or a feather, or marks of the sculpture of an insect; pitted, as a pustule.