Definitions

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

  • noun The intersection of a right circular cone and a plane, which generates one of a group of plane curves, including the circle, ellipse, hyperbola, and parabola.
  • noun A graph of the general quadratic equation in two variables.

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

  • noun geometry Any of the four distinct shapes that are the intersections of a cone with a plane, namely the circle, ellipse, parabola and hyperbola.

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

  • noun (geometry) a curve generated by the intersection of a plane and a circular cone

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