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uation y = axn where n is a positive whole number or a positive fraction. For the cubical parabola n = 3; for the semicubical parabola n = Cubical, and Semicubical. The parabolas have infinite branches, but no rectilineal asymptotes.

One branch of a parabola, being terminated at the principal vertex of the curve.

right angles, in which case it divides the curve into two symmetrical portions, as in the parabola, which has one such axis, the ellipse, which has two, or the circle, which has an infinite number. The two axes of the ellipse are the major axis and the minor axis, and the two axes of the hyperbola are the transverse ax…

y the intersection of the surface of a right cone and a plane. The conic sections are the parabola, ellipse, and hyperbola. The right lines and the circle which result from certain positions of the plane are sometimes, though not generally included. -- Conic sections, that branch of geometry which treats of the parabo…

ng a number into itself, and that product again by the same number. See Cube. -- Cubical parabola (Geom.), two curves of the third degree, one plane, and one on space of three dimensions.

Shaped like a snail shell; pertaining to the Helicidæ, or Snail family. Helicoid parabola (Math.), the parabolic spiral.

Having the form or nature of a parabola; pertaining to, or resembling, a parabola; as, a parabolic curve.

In the form of a parabola.

Resembling a parabola in form.

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.

ellipse and hyperbola, a third proportional to any diameter and its conjugate, or in the parabola, to any abscissa and the corresponding ordinate.

Of or pertaining to the square root of the cube of a quantity. Semicubical parabola, a curve in which the ordinates are proportional to the square roots of the cubes of the abscissas.