from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of a set of objects resulting from the generalization of a two-dimensional circle and a three-dimensional sphere to n dimensions. In n-dimensional space, a hypersphere is the set of all points that are a given distance, called the radius, from a given point, called the center.

from The Century Dictionary.

  • noun Equidistantial surface.
  • noun In four-dimensional space, the three-dimensional quadric spaces through the intersection of X5 = 0 and where is a three-dimensional space which is met by any line of S4 in two points.

from the GNU version of the Collaborative International Dictionary of English.

  • noun A mathematical object existing in more than three dimensions, analogous to the sphere in that all points on the surface are equidistant from the central point; a generalization of a sphere in more than three dimensions.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geometry The set of all points in a given hyperspace that are at a given distance from a given point.
  • noun sports A zorb; the act of zorbing, entering a zorbing ball, strapping into a harness, and rolling down a hill.


from Wiktionary, Creative Commons Attribution/Share-Alike License

hyper- + sphere


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  • Extremely spherical.

    July 19, 2009

  • in contrast to the hyposphere, which is manifestly deficient in sphericity, a bit like a hedgehog being stretched on the rack by some tziganoporcaphobic Torquemada.

    July 19, 2009

  • Reminds me of Rounder Records.

    July 19, 2009