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单词 conic section
释义

conic section

noun

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
  • 1 straight lines
  • 2 circle
  • 3 ellipse
  • 4 parabola
  • 5 hyperbola

Example Sentences

Recent Examples on the Web Given one rational point P on such a graph, there is an elegant way to find all the other rational points: Simply take each line that passes through P with a rational slope, and calculate the line’s second intersection point with the conic section. Quanta Magazine, 9 July 2013 The graphs of such curves are the conic sections — circles, parabolas, ellipses and hyperbolas. Quanta Magazine, 9 July 2013

Word History

First Known Use

1664, in the meaning defined at sense 1

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更新时间:2024/12/24 11:09:46