Dictionary.net

A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus.

One of a group of curves defined by the equation y = axn where n is a positive whole number or a positive fraction. For the cubical parabola n = 3; for the semicubical parabola n = /. See under Cubical, and Semicubical. The parabolas have infinite branches, but no rectilineal asymptotes.

A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus.

One of a group of curves defined by the equation y = axn where n is a positive whole number or a positive fraction. For the cubical parabola n = 3; for the semicubical parabola n = /. See under Cubical, and Semicubical. The parabolas have infinite branches, but no rectilineal asymptotes.

One of the conic sections formed by the intersection of the cone with a plane parallel to a line drawn from its apex to the circumference of its base.

(geom.) A conic section formed by the intersection of the cone with a plane parallel to one side.

Curve or figure formed by the intersection of a cone with a plane parallel to one side.

A curve formed by the cutting of a cone by a plane parallel to one of its sides; one of the conic sections.

n. [Latin, Greek] A curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the direction.