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 classic literature ?
The smaller room was something like a chapel in a cathedral, or a grotto in a cave, for the booming sound of the traffic in the distance suggested the soft surge of waters, and the oval mirrors, with their silver surface, were like deep pools trembling beneath starlight.
The honda is a golden oval and accurate weight for the throwing of the noose.
The shield, long and oval, is utilized more as back-armor than as a defense against frontal attack, for the close-set armlets of gold upon the left forearm are principally depended upon to ward off knife, spear, hatchet, or arrow from in front; but against the greater carnivora and the attacks of several human antagonists, the shield is utilized to its best advantage and carried by loops upon the left arm.
Archie and Charlie, evidently great cronies, were pacing up and down, shoulder to shoulder, whistling "Bonnie Dundee"; Mac was reading in a corner, with his book close to his near-sighted eyes; Dandy was arranging his hair before the oval glass in the hat-stand; Geordie and Will investigating the internal economy of the moon-faced clock; and Jamie lay kicking up his heels on the mat at the foot of the stairs, bent on demanding his sweeties the instant Rose appeared.
He walked to the companion and stooping low to put the flare in its usual place saw in the darkness the motionless pale oval of Mrs.
He remained bent low, his head inside the cover staring at that white ghostly oval.
Her cheeks were of the oval kind; and in her right she had a dimple, which the least smile discovered.
The eyes were large and brown and lustrous, the mouth sweet and sensitive, and the face itself a delicate oval, though sun and exposure to briny wind had burnt the face scarlet.
Over the easy chair there hung in a gold frame an oval portrait of Anna, a fine painting by a celebrated artist.
She turned, being then in the brightness of a lamp; and raising her hood a little, showed a quiet oval face, dark and rather delicate, irradiated by a pair of very gentle eyes, and further set off by the perfect order of her shining black hair.
Telstra CEO, David Thodey, today unveiled plans to turn Adelaide Oval into one of Australia s most technically advanced connected stadiums.
Light ovals in these latitudes have commonly been recorded on high resolution images since 1973 (Figures 1 & S1).