# ellipticity

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See oblateness.

## ellipticity

[ē‚lip′tis·əd·ē]
(astronomy)
The difference between the equatorial and polar radii of a planet divided by the mean radius.
(electronics)
(mathematics)
Also known as oblateness.
For an ellipse, the difference between the semimajor and semiminor axes of the ellipse, divided by the semimajor axis.
For an oblate spheroid, the difference between the equatorial diameter and the axis of revolution, divided by the equatorial diameter.
References in periodicals archive ?
1]) of the experimental curve of the HVSR, the transfer function and Rayleigh wave ellipticity for the fundamental mode.
For this reason, it is very desirable to develop a methodology for the analysis of the Rayleigh-wave ellipticity that can be used to determine the local crustal structure beneath the recording station (seismic station).
The polarization azimuth rotation angle [theta] denotes the rotation angle between the polarization planes of the emitted and incident waves, while the ellipticity [eta] represents the polarization state of the emitted wave.
In order to obtain more stable radiation patterns and decrease the ellipticity, parasitical arms are printed on the other side of the substrate and connected by metal pins.
The ellipticity angle ([eta]) and polarization azimuth rotation angle ([theta]) of the transmitted wave were calculated according to above equations, respectively, and results are shown in Figs.
For practical reasons, only a value of LAR has to be chosen to perform the design of the lens so, following the procedure adopted in this paper, it is no possible to fully compensate the ellipticity of all the cells of the cluster at the same time (see next Section 5).
Polarity, ellipticity, elicitation and propositional development, their relevance to the well-formedness of an exchange.
e is the ellipticity value of a bond, the greater the e value, the more obvious p characters of the bond, conversely,the s characters of the bond is stronger.
The ellipticity is a good approximation of the ratio of the quadrature component of the vertical secondary magnetic field to the horizontal primary field (Paterson and Ronka, 1971).
However, ellipticity of stem cross sections was evident, particularly in the bottom few meters of stems.
43) Radiation > radiacion; ellipticity > elipticidad; discriminator > discriminador; photosynthetic > fotosintetico; reflectance > reflectancia.
Follicle characteristics, seasonal chavges in fibre-sectional area and ellipticity in Australian specialty carpet wool sheep, Romneys and Merinos.

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