DICT.TW Dictionary Taiwan
3.235.154.65

Search for:
[Show options]
[Pronunciation] [Help] [Database Info] [Server Info]

2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Pa·rab·o·la n.; pl. Parabolas   Geom. (a) 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. (b) 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.
 

From: Webster's Revised Unabridged Dictionary (1913)

 Sem·i·cu·bic·al a. Math. 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.