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

  • noun Either of two quadric surfaces generated by rotating a hyperbola about either of its main axes and having a finite center with certain plane sections that are hyperbolas and others that are ellipses or circles.

from The Century Dictionary.

  • noun A quadric surface having a center not at infinity, and some of its plane sections hyperbolas.
  • noun A hyperbola of a higher order.

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

  • adjective (Geom.) Having some property that belongs to an hyperboloid or hyperbola.
  • noun (Geom.) A surface of the second order, which is cut by certain planes in hyperbolas; also, the solid, bounded in part by such a surface.
  • noun an hyperboloid described by an hyperbola revolving about one of its axes. The surface has two separate sheets when the axis of revolution is the transverse axis, but only one when the axis of revolution is the conjugate axis of the hyperbola.

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

  • noun A particular surface in three-dimensional Euclidean space, the graph of a quadratic with all three variables squared and their coefficients not all of the same sign.

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

  • noun a quadric surface generated by rotating a hyperbola around its main axis


Sorry, no etymologies found.


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