el·lip·soid

(ĭ-lĭp′soid′)

A geometric surface, all of whose plane sections are either ellipses or circles.

el·lip′soid′, el·lip′soi′dal (ĭ-lĭp′soid′l, ĕl′ĭp-, ē′lĭp-) adj.

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.

ellipsoid

(ɪˈlɪpsɔɪd)

(Mathematics)

a. a geometric surface, symmetrical about the three coordinate axes, whose plane sections are ellipses or circles. Standard equation: x²/a² + y²/b² + z²/c² = 1, where ±a, ±b, ±c are the intercepts on the x-, y-, and z- axes

b. a solid having this shape: the earth is an ellipsoid.

ellipsoidal adj

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

el•lip•soid

(ɪˈlɪp sɔɪd)

n.

1. a solid figure whose plane sections are all ellipses or circles.

adj.

2. ellipsoidal.

[1715–25; < French ellipsoïde]

el·lip·soid

(ĭ-lĭp′soid′)

A three-dimensional geometric figure resembling a flattened sphere. Any cross section of an ellipsoid is an ellipse or circle.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun	1.	ellipsoid - a surface whose plane sections are all ellipses or circles; "the Earth is an ellipsoid" plane figure, two-dimensional figure - a two-dimensional shape
Adj.	1.	ellipsoid - having the nature or shape of an ellipsoid ellipsoidal, spheroidal rounded - curving and somewhat round in shape rather than jagged; "low rounded hills"; "rounded shoulders"

Translations

Ellipsoid

ellipsoidi

ellipsoïde

ellipsoid

Mentioned in

References in classic literature

"Like Sir George Cayley's balloon, his own was an ellipsoid. Its length was thirteen feet six inches - height, six feet eight inches.

View in context

To cover several kinds of mismatches together, the adaptive flat ellipsoid models are introduced in our method as tight as possible.

Iterative robust capon beamforming with adaptively updated array steering vector mismatch levels

To avoid both the inconsistency of the basic convex combination and the lack of performance of the covariance intersection method, internal ellipsoid approximation fusion (IEAF) has been proposed [15].

Robust estimation fusion in wireless senor networks with outliers and correlated noises

Obviously, such scatterers will all lie on the surface of an ellipsoid, with the transmit and receive aircraft located in the foci of this ellipsoid.

Joint delay Doppler probability density functions for air-to-air channels

At each sampling instant, the predicted future states on the finite horizon are bounded by using a sequence of ellipsoids. The terminal ellipsoid is contained in a target set guaranteeing stability.

An offline formulation of MPC for LPV systems using linear matrix inequalities

For MJS (1), an ellipsoid set [THETA] = {x [member of] [R.sup.[n.sub.x]] | [x.sup.T.sub.k][P.sub.k]([r.sub.k])[x.sub.k] [less than or equal to] [[gamma].sub.k]} associated with the state is said to be asymptotically mode-dependent stable, if the following holds, whenever [x.sub.[k.sub.0]] [member of] [THETA], then [x.sub.k] [member of] [THETA] for k [greater than or equal to] [k.sub.0] and [x.sub.k] [right arrow] 0 when k [right arrow] [infinity].

A simplified predictive control of constrained Markov jump system with mixed uncertainties

Urediniospores subglobose, ellipsoid or obovoid, yellowish brown, 19-25 x 28-35 (-40) um; wall echinulate, 1-1.5 um; germ pores upto 2, equatorial.

New Records of Uredinales (Basidiomycota) from Azad Jammu and Kashmir and Adjacent Northern Areas of Pakistan

If this problem is extended to three-dimensions, the objective becomes that of finding the radius of a sphere such that the surface areas of the portions of the sphere and an ellipsoid that are inside one another are equal.

The area of the solid of intersection of a sphere and an ellipsoid, a first approach

The block model estimate was performed using interpolation according to the inverse of the distance from nearest composites and the ellipsoid influenced distance in calculation which were adapted for the geology of the deposit by application of the variable direction search ellipsoid special tool in Genesis software for folded deposits.

Berkwood files robust pit constrained mineral resources at its Lac Gueret South Project on SEDAR

Within the area of the OpRegen cell transplant, signs of a reduction and change in drusen material, as well as improvements or possible restorations of the ellipsoid zone and RPE layers, have persisted.

Encouraging Results From OpRegen Phase 1/2a Clinical Study Presented

Where a, b and c are the semi-dimensions of the scalene ellipsoid l/2, w/2 and t/2 respectively.

Determination of the physical properties of fermented and dried Venezuelan Trinitrio cocoa beans (Theobroma cacao L.)/Determinacion de las Propiedades Fisicas de Habas Fermentadas y Secas de Cacao Trinitario Venezolano (Theobroma cacao L.)

Mylonitic rocks formed as a result of heterogeneous shear strain in the ductile shear zone, and their fabric directly related to the strain rate, finite strain ellipsoid shape and orientation (Watts and Williams, 1983; Zhang et al., 2010; Mulchrone and Talbot, 2014; Fossen and Cavalcante, 2017).

CONSTRAINING OF STRAIN ELLIPSOID SHAPE FROM SECTIONAL DATA IN THE AU BEARING SHEAR ZONE WEST OF IRAN