Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
 noun 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.
from The Century Dictionary.
 noun A curve commonly defined as the intersection of a cone with a Plane parallel with its side.
 noun By extension, any algebraical curve, or branch of a curve, having the line at infinity as a real tangent.
 noun Same as
parabole .
from the GNU version of the Collaborative International Dictionary of English.
 noun 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 thedirectrix . Seefocus .  noun 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 thesemicubical parabola n = 3/2. See undercubical , andsemicubical . The parabolas have infinite branches, but no rectilineal asymptotes.
from Wiktionary, Creative Commons Attribution/ShareAlike License.
 noun geometry The
conic section formed by theintersection of acone with aplane parallel to atangent plane to the cone; thelocus ofpoints equidistant from a fixed point (thefocus ) and line (thedirectrix ).  noun rhetoric The explicit drawing of a parallel between two essentially dissimilar things, especially with a moral or didactic purpose. A
parable .
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
 noun a plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the curve
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
from Wiktionary, Creative Commons Attribution/ShareAlike License
Examples

Ms. Drugge, my 8th grade math teacher, was explaining that the model we were dissecting was called a parabola.

Ms. Drugge, my 8th grade math teacher, was explaining that the model we were dissecting was called a parabola.

Ms. Drugge, my 8th grade math teacher, was explaining that the model we were dissecting was called a parabola.

Terrified of boys and the showers … especially since I have actually witnessed one myself. barely missed me and the parabola is impressive.

For example, Archimedes proved that the area of a section of a parabola is fourthirds the area of the triangle inside it (shown in red in the diagram below).

Ms. Drugge, my 8th grade math teacher, was explaining that the model we were dissecting was called a parabola.

She smiled again – brutally, we thought – described a significant parabola from the mouth outwards with her hand, raised her eyebrows, and asked us something in Catalan.

The arching curve above  technically known as a "parabola"  is the signature of the squaring function x2 operating behind the scenes.

The arching curve above  technically known as a "parabola"  is the signature of the squaring function x2 operating behind the scenes.

Claim someone shot out the indow of your Congressoinal office when it was really just a satellite office, happened at like 1 or 2 a.m., the trajectory of th ebullet meant the shooter was either wearing the baloonboy balloon and shooting from above or such a superb marksman he could aim a bullet's parabola from the ground while firing straight up, and IT WASN'T EVEN A WINDOW TO THE OFFICE SPACE YOU WERE RENTING, BUT A NEARBY WINDOW IN THE SAME BUILDING.
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