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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



... seasons, and this in the way which we will now endeavour to set forth, though we must do it at the cost of considerable attention on the part of the reader, for the facts are somewhat complicated. In the first place, we must note that the ellipticity of the earth's orbit is not developed on fixed lines, but is endlessly varied, as we can readily imagine it would be for the reason that its form depends upon the wandering of the outer planetary ...
— Outlines of the Earth's History - A Popular Study in Physiography • Nathaniel Southgate Shaler

... or across it, show the same exactly circular form, and the same radius. Of course, if there was any appreciable increase of range along or across the cleavage the form of the halo on the section across the cleavage should be elliptical. The fact that there is no measurable ellipticity is, I think, one which on first consideration would not ...
— The Birth-Time of the World and Other Scientific Essays • J. (John) Joly



Words linked to "Ellipticity" :   elliptic, roundedness, oblateness, bulginess



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