Earth as a hypothetical ellipsoid, 5 letters
Earth's shape, hypothetically, 5 letters
Earth's surface, hypothetically, 5 letters
Ellipsoid flattened at the poles, 5 letters
Ellipsoid geometric figure, 5 letters
Imaginary surface coinciding with sea level, 5 letters
Imaginary surface coinciding with the earth's sea level, 5 letters
Surface like Earth's, 5 letters