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ellipticity

[ih-lip-tis-i-tee, el-ip-, ee-lip-] /ɪ lɪpˈtɪs ɪ ti, ˌɛl ɪp-, ˌi lɪp-/
noun
1.
the degree of divergence of an ellipse from a circle.
Origin
1745-1755
1745-55; elliptic- (see elliptical) + -ity
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ellipticity

ellipticity

/ɪlɪpˈtɪsɪtɪ; ˌɛl-/
noun
1.
the degree of deviation from a circle or sphere of an elliptical or ellipsoidal shape or path, measured as the ratio of the major to the minor axes
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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