1) Earthlike shape 2) Ellipsoid geometric figure 3) Geographical geometric figure 4) Shape of the earth 
The geoid is the shape that the surface of the oceans would take under the influence of Earth`s gravitation and rotation alone, in the absence of other influences such as winds and tides. This surface is extended through the continents (such as with very narrow hypothetical canals). All points on the geoid have the same gravitational potential. T....
figure of the earth
model of the figure of the Earth—i.e., of the planet`s size and shape—that coincides with mean sea level over the oceans and continues in continental ... [3 related articles]
The hypothetical shape of Earth`s globe used in geodetic calculations; the surface of the geoid is approximately the same as mean sea level envisaged as extending over the entire surface of the globe.
An imaginary shape for the earth defined by mean sea level and its imagined continuation under the continents at the same level of gravitational potential.
True shape of the Earth, which deviates from a perfect sphere because of a slight bulge at the equator.
geoid A figure resembling the shape of the earth.
The equipotential surface of the Earth`s gravity field which best fits, in the least squares sense, MEAN SEA LEVEL.