omphalos

From Ancient Greek ὀμφαλός (omphalós, “navel”).

• IPA^(key): /ˈɒmfəlɒs/[1]

omphalos (plural omphaloi)

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.

1. • 1922, James Joyce, Ulysses, page 17:

     —Rather bleak in wintertime, I should say. Martello you call it? —Billy Pitt had them built, Buck Mulligan said, when the French were on the sea. But ours is the omphalos.