## parabola

parabola (pərăb´ələ), plane curve consisting of all points equidistant from a given fixed point (focus) and a given fixed line (directrix). It is the conic section cut by a plane parallel to one of the elements of the cone. The axis of a parabola is the line through the focus perpendicular to the directrix. The vertex is the point at which the axis intersects the curve. The latus rectum is the chord through the focus perpendicular to the axis. Examples of this curve are the path of a projectile and the shape of the cross section of a parallel beam reflector.

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## parabola

parabola (geom.) plane curve formed by the intersection of a cone by a plane parallel to a side of the cone. XVI. — modL. — Gr. parabolḗ juxtaposition, application; see prec.
So parabolic pert. to parable, metaphorical XVII. — late L. — late Gr.; pert. to a parabola XVIII. parabolical (in both senses) XVI.

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## parabola

parabola Mathematical curve, a conic section traced by a point that moves so that its distance from a fixed point, the focus, is equal to its distance from a fixed straight line, the directrix. It may be formed by cutting a cone parallel to one side. The general equation of a parabola is y = ax2 + bx + c, where a, b, and c are constants.

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# Parabola (Journal)

Journal of the Society for the Study of Myth & Tradition, concerned with exploring the inner being through myth and its manifestations. Published quarterly. Address: 656 Broadway, New York, NY 10012. Website: http://www.parabola.org/.

### Sources:

Parabola Online. http://www.parabola.org/. March 8, 2000.

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## parabola

pa·rab·o·la / pəˈrabələ/ • n. (pl. -las or -lae / -lē/ ) a symmetrical open plane curve formed by the intersection of a cone with a plane parallel to its side. The path of a projectile under the influence of gravity ideally follows a curve of this shape.

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"parabola." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 24 May. 2017 <http://www.encyclopedia.com>.

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## parabola

parabola. Curve based on a conic section, that is the intersection of a cone with a plane parallel to its side. It resembles a three-centred arch, vertically emphasized.

Bibliography

Nicholson (1835)

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"parabola." A Dictionary of Architecture and Landscape Architecture. . Encyclopedia.com. 24 May. 2017 <http://www.encyclopedia.com>.

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## parabola

parabolaareola, rubeola •Viola •dueller (US dueler), jeweller (US jeweler) •babbler, dabbler, parabola •labeller (US labeler) •dribbler, nibbler, quibbler, scribbler •libeller (US libeler) •hobbler, nobbler, squabbler, wobbler •bubbler •fumbler, mumbler, rumbler •burbler, hyperbola •bachelor •paddler, straddler •mandala • panhandler • meddler •ladler • wheedler •diddler, piddler, riddler, tiddler, twiddler •coddler, modeller (US modeler), toddler, twaddler, waddler •fondler, gondola •yodeller (US yodeler) •doodler •muddler, puddler •hurdler • waffler •shuffler, snuffler •haggler, straggler •mangler, wangler •finagler •giggler, wiggler, wriggler •smuggler, struggler •pergola • heckler •Agricola, Nicola, pickler, tickler, tricolour (US tricolor) •chronicler •snorkeller (US snorkeler) •chuckler •enameller (US enameler) •signaller (US signaler) •tunneller (US tunneler) •grappler • stapler •stippler, tippler •Coppola •gospeller (US gospeler) •cupola •caroller (US caroler) •Kerala •quarreller (US quarreler) •chancellor •penciller (US penciler) •whistler •battler, prattler, rattler, tattler •dismantler • startler •fettler, settler, settlor •belittler, victualler (US victualer) •hospitaller (US hospitaler) •bottler, throttler •hosteller (US hosteler) •caviller (US caviler), traveller (US traveler) •marveller (US marveler) •leveller (US leveler), reveller (US reveler) •driveller (US driveler), sniveller (US sniveler) •groveller (US groveler) •shoveler, shoveller •chiseller (US chiseler), sizzler •bamboozler, methuselah •guzzler