Ellipticity

Ellipticity redirects here. For the mathematical topic of ellipticity, see elliptic operator. The flattening, ellipticity, or oblateness of an oblate spheroid is the "squashing" of the spheroid's pole, down towards its equator.
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Noun
1. the property possessed by a rounded shape that is flattened at the poles; "the oblateness of the planet"
(synonym) oblateness
(hypernym) roundedness, bulginess

(n.)
Deviation of an ellipse or a spheroid from the form of a circle or a sphere; especially, in reference to the figure of the earth, the difference between the equatorial and polar semidiameters, divided by the equatorial; thus, the ellipticity of the earth is /.
  

COSTRUZIONE ELLITTICA. RAPPORTO ASSIALE. ELLITTICITÀ