Oval

(redirected from Ovality)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

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 ?
Directly after the first cooling, the Centerwave 6000 provides precise information about inner and outer diameter, ovality, wall thickness, and in particular, sagging.
First, the determination of ovality was made by calculating the difference between the maximum and minimum diameters of the cross section, expressed as a percentage of the minimum diameter.
The stresses created by the drawdown of the melt cone are examined as possible causes of melt ovality and tearing.
058 mm) on diameter and also on ovality, although much of the product on the market is more like [+ or -] 0.
Pipe Coil Technology has borrowed from its experience in equipment for producing off-shore umbilical hoses and combined that with trenchless ploughing-in techniques to develop Low Ovality Technology (LV) with which it says it is possible to produce HDPE and MDPE pipe in the 90 to 180 mm OD range with less than 5 per cent ovality.
2) Radius R and the maximum ovality of elbows - R = 61.
Other factors such as ovality and taper can govern optimal positioning and rotation.
The sophisticated SIC tool provides not only the determination of the corrosion status and growth rate, it also enables one to gain detailed information about the internal diameter and shape, such as ovality and dents.
5 percent initial ovality for both inner and outer pipes, which yields low collapse resistance and increased stresses on steels and adhesion interfaces.
The heads can be used with or without an additional wire feed unit, and they incorporate a profile compensation mechanism which takes into account any ovality in the tube or pipe profile.
It was flexible enough to accommodate the six percent ovality that existed in a short section of the combination line.