[1347] omphalos, ī, m. (ὀμφαλός), der Nabel, dah. meton. der Mittelpunkt, rein lat. umbilicus, Auson. edyll. 11, 60. p. 131, 7 Sch.
Herder-1854: Omphalos
Meyers-1905: Omphălos
Pierer-1857: Omphălos