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Definitions of ellipse

  1. a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it; "the sums of the distances from the foci to any point on an ellipse is constant" Scrapingweb Dictionary DB
  2. An oval or oblong figure, bounded by a regular curve, which corresponds to an oblique projection of a circle, or an oblique section of a cone through its opposite sides. The greatest diameter of the ellipse is the major axis, and the least diameter is the minor axis. See Conic section, under Conic, and cf. Focus. Webster Dictionary DB
  3. A curve that is longer than it is wide; one of the conic sections, or curves formed by cutting a cone. The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919.
  4. An oval figure. The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894.

Usage examples for ellipse

  1. Moreover, when a planet possesses a satellite, it is not the centre of the planet which ever attempts to describe the Keplerian ellipse but it is the common centre of gravity of the two bodies. – Pioneers of Science by Oliver Lodge
  2. In the first place, on taking a careful tracing of this piece of the edge, I found that its curve was part of an ellipse but watch- glasses, nowadays, are invariably circular. – The Mystery of 31 New Inn by R. Austin Freeman
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