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PARABOLA
PARABOLA
PARABOLA
a.
Having the form or nature of a parabola; pertaining to, or resembling, a parabola; as, a parabolic curve.
n.
Specifically (Conic Sections), in the ellipse and hyperbola, a third proportional to any diameter and its conjugate, or in the parabola, to any abscissa and the corresponding ordinate.
a.
Resembling a parabola in form.
pl.
of Parabola
adv.
In the form of a parabola.
n.
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.
n.
One branch of a parabola, being terminated at the principal vertex of the curve.
n.
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.
a.
Generated by the revolution of a parabola, or by a line that moves on a parabola as a directing curve; as, a parabolic conoid.
n.
The solid generated by the rotation of a parabola about its axis; any surface of the second order whose sections by planes parallel to a given line are parabolas.
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