Why it is called an oblait spheroid?

An oblate spheroid is called so because it is a three-dimensional geometric shape that resembles a sphere but is flattened at the poles and bulging at the equator. The term "oblate" comes from the Latin Word "oblatus," meaning "flattened," while "spheroid" refers to its spherical shape. This shape occurs due to the rotation of the object, as seen in planets like Earth, which is slightly flattened at the poles due to its rotation.