omphalos

Etymology
From. .

Noun

 * 1) An ancient religious stone artifact, or baetylus, used to denote the direction of the "center" of the world.
 * 2)  The theological proposition that the world was created with certain indicia of a history which had not actually occurred (such as the humans who had never been connected to umbilical cords being created with navels).
 * 3) The navel.
 * 4) A raised central point; a boss.
 * 5) The center or hub.