[puh-rab-uh-luh] 
| a plane curve formed by the intersection of a right circular cone with a plane parallel to a generator of the cone; the set of points in a plane that are equidistant from a fixed line and a fixed point in the same plane or in a parallel plane. Equation: y 2 = 2px or x2 = 2py. |
pa·rab·o·la (pə-rāb'ə-lə)  (click for larger image in new window) n. A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone or by the locus of points equidistant from a fixed line and a fixed point not on the line. [New Latin, from Greek parabolē, comparison, application, parabola (from the relationship between the line joining the vertices of a conic and the line through its focus and parallel to its directrix), from paraballein, to compare; see parable.] |
A geometrical shape (see geometry) consisting of a single bend and two lines going off to an infinite distance.
Note: An object that is propelled away from the Earth and then drawn back by gravity, such as a fly ball in baseball, follows a path shaped like a parabola.
parabola (pə-rāb'ə-lə) Pronunciation Key
(click for larger image in new window) The curve formed by the set of points in a plane that are all equally distant from both a given line (called the directrix) and a given point (called the focus) that is not on the line. |
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