noun
1. : a plane curve, line, or point that is the intersection of a plane and a right circular conical surface
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
[s]conicsec.jpg[/s] [
conic section 1: 1 straight lines, 2 circle, 3 ellipse, 4 parabola, 5 hyperbola
]