Oblate

Oblate also refers to a member of the Roman Catholic religious order of the Missionary Oblates of Mary Immaculate

An oblate spheroid is an ellipsoid having a shorter axis and two equal longer axes (see the spheroid page for a picture).

Oblateness is a measure for a planet that is a spheroid in shape, bulging outward in the center due to its rotation. Effectively the (fictitious) centrifugal force fights against gravity causing the planet to look more like a sphere stretched at the equator.

Mathematically, oblateness may be defined as

where the equatorial radius and is the polar radius.