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1. Deviation from perfect circular or spherical form toward elliptic or ellipsoidal form.
2. The degree of this deviation.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ɪlɪpˈtɪsɪtɪ; ˌɛl-)
(Mathematics) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ɪ lɪpˈtɪs ɪ ti, ˌɛl ɪp-, ˌi lɪp-)

the degree of divergence of an ellipse from a circle.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ellipticity - the property possessed by a round shape that is flattened at the poles; "the oblateness of the planet"
bulginess, roundedness - the property possessed by a rounded convexity
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The main aim is graphically represent the relative principle strain ellipticity ratio on the Flinn diagram and interpret structure developed underwent this deformation conditions.
This coercivity (ellipticity) property together with a corresponding boundedness property and consistency as well as approximation results for the IgA spaces yields the corresponding a priori discretization error estimates.
This has a strong influence on the Rayleigh waves and, in particular, on the ellipticity of the particle motion with a consequent increase of the ratio between the horizontal component H and the vertical one V of ground motion [64-66].
Connelly, "A Mueller-matrix formalism for modeling polarization azimuth and ellipticity angle in semiconductor optical amplifiers in a pump-probe scheme," Journal of Lightwave Technology, vol.
As shown in Figure 8, the CD spectrum of free HSA (line 1) exhibits two negative bands at 208 nm and 222 nm in the ultraviolet region, attributed to [pi]-[[pi].sup.*] transfer for the peptide bond, with a positive ellipticity at 193 nm, which is the characteristic of an [alpha]-helix structure of HSA [43].
Caption: Figure 6: CD spectra under different conditions measured from 260 nm to 190 nm and plotted as mean residue ellipticity [0] versus wavelength.
In order to detect the ellipticity of the wave's state of polarization, the reflected light wave is monitored with the help of a photoelastic modulator (PEM) (with 50 kHz modulation frequency), used as a switchable [lambda]/2 wave-plate, a second polarizer (analyzer), and finally a monochromator with a detector.
From the ellipticity condition in (10) and for [epsilon] = [lambda]/[K.sub.1][K.sub.0], we have
If we define the ellipticity as the angle 2[eta] whose tangent is the minor to major amplitude ratio of the polarization ellipse, then a plane wave, linearly polarized in origin, will present after propagating a distance z an ellipticity given by [29-31]
The thermal stability of different quadruplexes was measured by recording the CD ellipticity at 295 and 265 nm as a function of temperature [14, 46].
Let A = A(x) be an n x n matrix of complex [L.sup.[infinity]] coefficients defined on [R.sup.n] that satisfy the ellipticity condition: