conic section

noun

Definition of conic section

1 : a plane curve, line, pair of intersecting lines, or point that is the intersection of or bounds the intersection of a plane and a cone with two nappes
2 : a curve generated by a point which always moves so that the ratio of its distance from a fixed point to its distance from a fixed line is constant

Illustration of conic section

illustration of conic section

First Known Use of conic section

1664

in the meaning defined at sense 1

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