conic section

Noun
  1. referred to in: geometry - the pure mathematics of points and lines and curves and surfaces
    is a type of: plane figure, two-dimensional figure - a two-dimensional shape
    subtypes:
    • ellipse, oval - a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it
    • parabola - a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve
    • hyperbola - an open curve formed by a plane that cuts the base of a right circular cone
    same as: conic

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