# 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 ?
Today, however, the egg-shaped tank is usually constructed of concrete.
FRESH START An impression of the new building, including the egg-shaped pod over the entrance, an extension to the library
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Leading bathroom supplier Limestone Gallery has a star-studded client list, and its collection features a show-stopping egg-shaped bath in the same style as Jonathan's.
For egg-cellent style, Gianna Rose Atelier is rolling out new egg-shaped soaps for spring.
As Beth uncovers the hidden secrets of her aunt's "emporium", a former tourist attraction, she happens across an odd, perfectly egg-shaped stone.
If you go to public school and enjoy chasing egg-shaped balls, you are civilised, according toMacAskill and the police.
The pounds 52,000 lavatory, which is the height of a bungalow, will provide facilities for community users, who have worked on the design of the egg-shaped "toilet-pod" with the architects.
Boule, the pastry shop owned by Michelle Myers of Sona restaurant, offers truffle-filled chocolate eggs and milk or dark chocolate bunnies, marshmallows in rose, lemon and passion fruit flavors, macaroons, egg-shaped cakes and more.
For example, an egg-shaped roll caused a taut-slack web condition as it is unwound.

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