Godel Universe was one of the vocabulary words listed on the chart of the Bajoran wormhole, entitled "A Tunnel in the Sky". This chart was seen in the schoolroom aboard Deep Space 9 in 2369. (DS9: "In the Hands of the Prophets")
Godel Universe is a reference to the Godel Universe, which is a set theory in mathematics. It was introduced by the mathematician Kurt Gödel.