ellipticity


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

ellipticity

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 ?
It is known that the observed ellipticity of a Rayleigh wave can he calculated using the formula (Aki and Richards, 1980; Ben-Menahem and Singh, 1981)
The histograms show the FWHM, ellipticity (labeled eccentricity) and position angle of the ellipticity for all the objects in the catalog.
The best results were obtained alter eliminating the circularity and ellipticity metrics, which showed no linear trend over time.
2]) determines the ellipticity of the bump, or how far the bump deviates from being perfectly circular, and was sampled from the uniform distribution on the square [0.
On optical rotation and ellipticity transformation by an axially excited dielectric TFHBM slab.
He suggests that ellipticity may distinguish a brown dwarf from a planet.
The logs with more sweep and greater ellipticity increased processing time over straight and round logs due to additional log turning and elapsed time at the headrig.
The projection accounts for both the ellipsoidal nature of the earth and the ellipticity of satellite orbits but ignores the very small amount of terrain displacement error.
1A show that addition up to 10 [micro]M of TQ to HSA leads only to a tiny decrease in negative ellipticity without any changes in the spectrum shape, peak wavelength and the 222/208 nm peaks ratio, resulting in no rearrangements in secondary structure.
Polarity, Ellipticity and Propositional Development, their Relevance to the Well-formedness of an Exchange'.