Noun
The quality or state of being oblate.
Source: Webster's dictionarythe oblateness of the planet Source: Internet
Although Hanbury Brown et al. realized that Altair would be rotationally flattened, they had insufficient data to experimentally observe its oblateness. Source: Internet
However, in the real world, many bodies rotate, and this introduces oblateness and distorts the gravity field, and gives a quadrupole moment to the gravitational field which is significant at distances comparable to the radius of the body. Source: Internet
Lower oblateness of the primary alters its gravitational field in such a way that different possible resonances are spaced more closely together. Source: Internet