Ellipsoid of revolution
Ellipsoid El*lip"soid, n. [Ellipse + -oid: cf. F. ellipsoide.] (Geom.) A solid, all plane sections of which are ellipses or circles. See {Conoid}, n., 2 (a) . [1913 Webster]

Note: The ellipsoid has three principal plane sections, a, b, and c, each at right angles to the other two, and each dividing the solid into two equal and symmetrical parts. The lines of meeting of these principal sections are the axes, or principal diameters of the ellipsoid. The point where the three planes meet is the center. [1913 Webster]

{Ellipsoid of revolution}, a spheroid; a solid figure generated by the revolution of an ellipse about one of its axes. It is called a prolate spheroid, or prolatum, when the ellipse is revolved about the major axis, and an oblate spheroid, or oblatum, when it is revolved about the minor axis.


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • ellipsoid of revolution — sukimosi elipsoidas statusas T sritis fizika atitikmenys: angl. ellipsoid of revolution vok. Drehellipsoid, n; Rotationsellipsoid, n rus. эллипсоид вращения, m pranc. ellipsoïde de révolution, m …   Fizikos terminų žodynas

  • ellipsoid of revolution — noun a shape that is generated by rotating an ellipse around one of its axes it looked like a sphere but on closer examination I saw it was really a spheroid • Syn: ↑spheroid • Derivationally related forms: ↑spheroidal (for: ↑spheroid) …   Useful english dictionary

  • oblate ellipsoid of revolution — Etymology: oblate (II) : the ellipsoid of revolution obtained by revolving an ellipse about its minor axis …   Useful english dictionary

  • Ellipsoid — El*lip soid, n. [Ellipse + oid: cf. F. ellipsoide.] (Geom.) A solid, all plane sections of which are ellipses or circles. See {Conoid}, n., 2 (a) . [1913 Webster] Note: The ellipsoid has three principal plane sections, a, b, and c, each at right… …   The Collaborative International Dictionary of English

  • ellipsoid — /i lip soyd/, n. 1. Geom. a solid figure all plane sections of which are ellipses or circles. Typical equation: (x2/a2) + (y2/b2) + (z2/c2) = 1. adj. 2. ellipsoidal. [1715 25; < F ellipsoïde. See ELLIPSE, OID] * * * ▪ geometry       closed… …   Universalium

  • ellipsoid — Conoid Co noid (k[=o] noid), n. [Gr. kwnoeidh s conical; kw^nos cone + e i^dos form: cf. F. cono[ i]de.] 1. Anything that has a form resembling that of a cone. [1913 Webster] 2. (Geom.) (a) A solid formed by the revolution of a conic section… …   The Collaborative International Dictionary of English

  • Figure of the Earth — An oblate spheroid Geodesy …   Wikipedia

  • History of geodesy — See also the main article on Geodesy. Humanity has always been interested in the Earth. During very early times this interest was limited, naturally, to the immediate vicinity of home and residency, and the fact that we live on a near spherical… …   Wikipedia

  • Index ellipsoid — In optics, an index ellipsoid is a diagram of an ellipsoid that depicts the orientation and relative magnitude of refractive indices in a crystal. The equation for the ellipsoid is constructed using the electric displacement vector D and the… …   Wikipedia

  • Oblate ellipsoid — Oblate Ob*late , a. [L. oblatus, used as p. p. of offerre to bring forward, offer, dedicate; ob (see {Ob }) + latus borne, for tlatus. See {Tolerate}.] [1913 Webster] 1. (Geom.) Flattened or depressed at the poles; as, the earth is an oblate… …   The Collaborative International Dictionary of English

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