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WORDNET DICTIONARY
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WORDNET DICTIONARY
Noun ellipticity has 1 sense
- ellipticity(n = noun.attribute) oblateness - the property possessed by a round shape that is flattened at the poles; "the oblateness of the planet" is a kind of bulginess, roundedness
Derived forms adjective elliptic2, adjective elliptic1
CIDE DICTIONARY
ellipticity, n. [Cf. F. ellipticité.].
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 1913 Webster]
" Some writers use ellipticity as the ratio of the difference of the two semiaxes to the minor axis, instead of the major." Nichol.
[1913 Webster]