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1. Oxford Dictionary

   conic section

   英式

   • n.
     a figure formed by the intersection of a plane and a circular cone. Depending on the angle of the plane with respect to the cone, a conic section may be a circle, an ellipse, a parabola, or a hyperbola.

   • noun: conic section, plural noun: conic sections

2. • 更多解釋

   conic section

   • IPA[ˈkänik ˈsekSHən]

   美式

   • n.
     a figure formed by the intersection of a plane and a right circular cone. Depending on the ...

   Oxford American Dictionary