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Ellipticity   Listen
noun
Ellipticity  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 1:29966. Note: Some writers use ellipticity as the ratio of the difference of the two semiaxes to the minor axis, instead of the major.






Collaborative International Dictionary of English 0.48








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"Ellipticity" Quotes from Famous Books



... earth. Such was the idea as it originally occurred to Laplace. By means of a minutely careful investigation, he discovered in its motion two well-defined perturbations, each depending on the spheroidal figure of the earth. When these were submitted to calculation, each led to the same value of the ellipticity. It must be recollected that the ellipticity thus derived from the motions of the moon is not the one corresponding to such or such a country, to the ellipticity observed in France, in England, in Italy, in Lapland, in North America, in India, ...
— Library Of The World's Best Literature, Ancient And Modern, Vol. 2 • Charles Dudley Warner

... very eccentric orbits, and their orbits are curiously intermixed, varying widely among themselves, both in ellipticity and in inclination to the common plane of ...
— Other Worlds - Their Nature, Possibilities and Habitability in the Light of the Latest Discoveries • Garrett P. Serviss



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