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Ellipsoid   /ɪlˈɪpsɔɪd/   Listen
noun
Ellipsoid  n.  (Geom.) A solid, all plane sections of which are ellipses or circles. See Conoid, n., 2 (a). 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.
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.



adjective
Ellipsoidal, Ellipsoid  adj.  Pertaining to, or shaped like, an ellipsoid; as, ellipsoid or ellipsoidal form.






Collaborative International Dictionary of English 0.48








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"Ellipsoid" Quotes from Famous Books



... The ellipsoid-shaped saucer had been tracked at a height of 56 miles, its speed 5 miles per second. This was 18,000 miles per hour, even faster than Redell had said. The strange craft, 105 feet in length, had climbed as swiftly as Marvin Miles had described ...
— The Flying Saucers are Real • Donald Keyhoe

... cylindric (rodlets), ellipsoid or ovoid, and straight. Division planes always perpendicular ...
— Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 - "Baconthorpe" to "Bankruptcy" • Various

... Ellipses and Ovals. Focal Points. Produced Line. Spirals, Perpendicular and Vertical. Signs to Indicate Measurement. Definitions. Abscissa. Angle. Apothegm. Apsides or Apsis. Chord. Cycloid. Conoid. Conic Section. Ellipsoid. Epicycloid. Evolute. Flying Buttress. Focus. Gnomes. Hexagon. Hyperbola. Hypothenuse. Incidental. Isosceles. Triangle. Parabola. Parallelogram. Pelecoid. Polygons. Pyramid. Rhomb. Sector. Segment. Sinusoid. Tangent. ...
— Carpentry for Boys • J. S. Zerbe

... latter being sometimes supported on a receptacle. Hymenium on the surface of the gleba which is enclosed within the peridium up to the maturity of the spores or longer; spores continuous, sphaeroid or ellipsoid, hyaline ...
— Studies of American Fungi. Mushrooms, Edible, Poisonous, etc. • George Francis Atkinson

... globe, where certainty is much more attainable than among distant stars, we have seen that astronomers of the very highest rank are by no means agreed as to its diameter. Its precise form is equally difficult to determine. Newton showed that an ellipsoid of revolution should differ from a sphere by a compression of 1/230. The mean of a number of varying measurements of arcs, in five different places, would give 1/299. The pendulum measurement differs very considerably from both, and "no two sets of pendulum experiments ...
— Fables of Infidelity and Facts of Faith - Being an Examination of the Evidences of Infidelity • Robert Patterson



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