The architectural structure of the Umbracle in Valencia, Spain is an example of a parabola.

A u-shaped graph of a quadratic function is an example of a parabola.

## parabola

*focus*) and from a fixed straight line (

*directrix*); curve formed by the section of a cone cut by a plane parallel to the side of the cone

Origin of parabola

Modern Latin from Classical Greek*parabol?,*literally , application, comparison (see parable): it is produced by the “application” of a given area to a given straight line

## parabola

noun

Origin of parabola

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**.

**parabola**

Any point on a parabola is the same distance from the directrix as it is from the focus (F). AC equals CF and BD equals DF.

## parabola

(*plural* parabolas *or* parabolae *or* parabolÃ¦)

- (geometry) The conic section formed by the intersection of a cone with a plane parallel to a tangent plane to the cone; the locus of points equidistant from a fixed point (the focus) and line (the directrix).
- (rhetoric) The explicit drawing of a parallel between two essentially dissimilar things, especially with a moral or didactic purpose. A parable.

From Ancient Greek *Ï€Î±ÏÎ±Î²Î¿Î»Î®* (parabolÄ“), from *Ï€Î±ÏÎ±Î²Î¬Î»Î»Ï‰* (paraballÅ, “I set side by side"), from *Ï€Î±ÏÎ¬* (para, “beside") + *Î²Î¬Î»Î»Ï‰* (ballÅ, “I throw").