Sadly, saying that it's an oblate spheroid or a geoid or anything else isn't 100 % true either.
12.
Uranus is an oblate spheroid, which causes its visible area to become larger when viewed from the poles.
13.
The problem of finding a geodesic on an oblate spheroid is much more complex and cannot by solved analytically.
14.
Because the Earth is spinning, it has been stretched about its middle from a perfect sphere into an oblate spheroid.
15.
The oblate spheroid shape reflects, following Clairaut's theorem, the balance between containment by gravitational attraction and dispersal by centrifugal force.
16.
The curves of constant \ zeta are oblate spheroids and the curves of constant \ xi are the hyperboloids of revolution.
17.
Maybe you've seen the grainy black-and-white footage of the big oblate spheroid as it began its fateful descent so long ago.
18.
Here c = kd / 2, with d being the interfocal length of the elliptical cross section of the oblate spheroid.
19.
Their work along with another team in Lapland established that the Earth was an oblate spheroid rather than a true sphere.
20.
Sometimes neutron stars absorbs orbiting matter from companion stars, increasing the rotation rate and reshaping the neutron star into an oblate spheroid.