from The American Heritage® Dictionary of the English Language, 4th Edition

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

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a surface, all of whose cross sections are elliptic or circular (includes the sphere)
  • n. Such a surface used as a model of the shape of the earth.
  • adj. Shaped like an ellipse; elliptical.
  • adj. Of or pertaining to an ellipse.
  • adj. Having the tridimensional shape of an ellipse rotated on its long axis.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Pertaining to, or shaped like, an ellipsoid.
  • n. A solid, all plane sections of which are ellipses or circles. See conoid, n., 2 (a).

from The Century Dictionary and Cyclopedia

  • n. In geometry, a solid figure all plane sections of which are ellipses or circles.
  • n. In anthropology, a cranium the norma verticalis of which has an ellipsoidal form.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a surface whose plane sections are all ellipses or circles
  • adj. having the nature or shape of an ellipsoid


Sorry, no etymologies found.


  • "The biological implementation of this mechanism is currently unknown, but there is evidence from a previous study that a brain area called the ellipsoid body (sometimes called the" fly motor cortex ") might be involved."

    Bunny and a Book

  • But some mathematicians and scientists fear that the new solution could turn out to be like a Russian discovery of a few years back, called the ellipsoid method, which was beautiful but not very useful in solving the workaday problems at which simplex excels.

    Economic Principals

  • [T] he variety of shapes found in the neurons of a wheel-shaped brain structure called the ellipsoid body "are just amazing," Peng says. - latest science and technology news stories

  • Always on the lookout for easy results, I experimented first with skinny ellipsoids, and discovered that the top of the Gherkin is too pointed for an ellipsoid to model.

    Wolfram Blog : Twisted Architecture

  • The FabLab House was designed as an ellipsoid structure prefabricated from wood that is formed into a rib-like structure.

    FabLab House: Solar Decathlon Europe Entry | Inhabitat

  • Instead of the horseshoe of CIE plane you get a sort of ellipsoid truncated by a plane on the purple side.

    Charting Pigments

  • Then you still get a measure of saturation along the line that is centered at white and describes the ellipsoid, the difference being that you need two angles and not just one to describe all the hues.

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  • But the compact ellipsoid motif itself represents a significant departure from the radically symmetrical circular motifs preceding it.

    Archive 2010-01-01

  • This is necessitated by the relative arbitrariness of the ellipsoid motif, which lacks any self-evident relation as shape to the square canvas in which it is centered.

    Archive 2010-01-01

  • The wine-red field appears to bring intense coloristic pressure to bear on the central motif; and this pressure seems both to account for its ellipsoid shape as well as for its suspension at the heart of the field.

    Michael Fried on Kenneth Noland


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