# Oval

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## Oval

the. a cricket ground in south London, in the borough of Lambeth

## Oval

Resembling an egg in shape, ellipsoidal or elliptical; it is duocentric with a long and short axis.

## Oval

a closed convex plane curve. A convex curve is a curve that has no more than two real points in common with any line. The ellipse and the circle are examples of ovals. If an oval has a tangent at every point, then to any direction in the plane there correspond just two tangents parallel to that direction.

Many theorems deal with properties of ovals. We mention two such theorems. (1) On every oval there are at least four points at which the curvature reaches a maximum or minimum. This is the so-called four-vertex theorem. The ellipse has precisely four such points—the ends of the major and minor axes. (2) If we have an oval of constant width, that is, if the distance d between any two parallel tangents to the oval is the same for all directions, then the length of the oval is equal to π d. The circle is the simplest oval of constant width. Another example is the figure obtained (Figure 1) by drawing six arcs of circles with centers at the vertices of an equilateral triangle with side a, where three of the circles have radii c, c arbitrary, and three have radii a + c.

Figure 1

In algebraic geometry the term “oval” is also applied to closed connected components of plane algebraic curves. There, however, the component is not necessarily convex.

## oval

[′ō·vəl]
(mathematics)
A curve shaped like a section of an egg.

## oval

A marble chip which has been tumbled until a smooth oval shape has resulted; used for terrazzo concrete.
References in periodicals archive ?
The silhouetted eucalypts, standing on the edge of an expanse of oval flatness, create a shape I've seen before in other loved places.
To cope with the expected demand, we will be running extra buses, trains and trams to a modified Adelaide Oval Express timetable.
However the long-term history of these ovals has not been evident, because they show a great range of drift rates subject to rapid changes which make long-term tracking awkward.
The new convenient oval shape format is ideal for topping individual pies and is versatile enough to be used as an individual pie base as well if desired.
Within a few minutes, the ovals were drawn and ready to be cut.
Scientists don't know whether Oval BA will stay red.
Each storm, imaged with the Hubble Space Telescope and ground-based detectors, resembles a white oval and covers an area half the size of Earth.
Working with Adelaide Oval Stadium Management Authority, Telstra will deliver increased mobile capacity as well as improve the spectator experience to connect fans, the stadium and the sports they love.
So with the mechanical design changes to the engine, we obviously had to do a lot of durability testing to confirm that the engine would be good for our target mileage of 1,400 miles, and then to ensure that with the new electronics package that we introduced for this coming year, that the calibrations and the strategies were suited to both oval and road course racing.
Plastic Bottle Corporation also introduced the new Olympian Oval to its line of plastic bottle products.
Five concentric ovals form the heart of the painting.
This allowed the other two ovals to catch up and lessen the distance between them.

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