An oval (from Latin ovum 'egg') is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas of mathematics (projective geometry, technical drawing, etc.), it is given a more precise definition, which may include either one or two axes of symmetry of an ellipse. In common English, the term is used in a broader sense: any shape which reminds one of an egg. The three-dimensional version of an oval is called an ovoid.
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👉 Oval in the context of Cassini oval
In geometry, a Cassini oval is a quartic plane curve defined as the locus of points in the plane such that the product of the distances to two fixed points (foci) is constant. This may be contrasted with an ellipse, for which the sum of the distances is constant, rather than the product. Cassini ovals are the special case of polynomial lemniscates when the polynomial used has degree 2.
Cassini ovals are named after the astronomer Giovanni Domenico Cassini who studied them in the late 17th century. Cassini believed that a planet orbiting around another body traveled on one of these ovals, with the body it orbited around at one focus of the oval.Other names include Cassinian ovals, Cassinian curves and ovals of Cassini.
In this Dossier
- ⭐ Core Definition: Oval
- 👉 Oval in the context of Cassini oval
- Oval in the context of Whorl
- Oval in the context of Backboard (basketball)
- Oval in the context of Cartouche (design)
- Oval in the context of Cartesian oval
- Oval in the context of Australian rules football playing field
- Oval in the context of IMac
- Oval in the context of Ringwork
Oval in the context of Whorl
A whorl (/wɜːrl/ or /wɔːrl/) is an individual circle, oval, volution or equivalent in a whorled pattern, which consists of a spiral or multiple concentric objects (including circles, ovals and arcs).
Oval in the context of Backboard (basketball)
A backboard is a piece of basketball equipment. It is a raised vertical board with an attached basket consisting of a net suspended from a hoop. It is made of a flat, rigid piece of, often Plexiglas or tempered glass which also has the properties of safety glass when accidentally shattered. It is usually rectangular as used in NBA, NCAA and international basketball. In recreational environments, a backboard may be oval or a fan-shape, particularly in non-professional games.
The top of the hoop is 10 feet (3.05 m) above the ground. Regulation backboards are 6 feet (1.83 m) wide by 3.5 feet (1.07 m) tall. All basketball rims (hoops) are 18 inches (46 cm) in diameter. The inner rectangle on the backboard is 24 inches (61 cm) wide by 18 inches (46 cm) tall, and helps a shooter determine the proper aim and banking for either a layup or distance shot.
Oval in the context of Cartouche (design)
A cartouche (also cartouch) is an oval or oblong design with a slightly convex surface, typically edged with ornamental scrollwork. It is used to hold a painted or low-relief design. Since the early 16th century, the cartouche is a scrolling frame device, derived originally from Italian cartuccia. Such cartouches are characteristically stretched, pierced and scrolling.
Another cartouche figures prominently in the 16th-century title page of Giorgio Vasari's Lives of the Most Excellent Painters, Sculptors, and Architects, framing a minor vignette with a pierced and scrolling papery cartouche.
Oval in the context of Cartesian oval
In geometry, a Cartesian oval is a plane curve consisting of points that have the same linear combination of distances from two fixed points (foci). These curves are named after French mathematician René Descartes, who used them in optics.
Oval in the context of Australian rules football playing field
An Australian rules football playing field is a venue where Australian rules football is played.
The playing field is typically a large oval-shaped grass surface, usually a modified cricket field, hence often known as an oval. These fields may vary especially for variations of the game. However, for official Australian Football League matches, strict requirement specifications must be met for stadiums.
Oval in the context of IMac
The iMac is a series of all-in-one computers from Apple, sold as part of the company's Mac family of computers. First introduced in 1998, it has remained a primary part of Apple's consumer desktop offerings since and evolved through seven distinct forms. The iMac natively runs the macOS operating system.
In its original form, the iMac G3 had a gumdrop, ADM-3 or egg-shaped look, with a CRT monitor, mainly enclosed by a colored, translucent plastic case. The computer was, at the time, an inexpensive, consumer-oriented computer that would easily connect to the Internet. The second major revision, the iMac G4, moved a design with a hemispherical base containing all the main components and an LCD monitor on a freely moving arm attached to it. The third and fourth revisions, the iMac G5 and the Intel iMac, placed all the components immediately behind the display in a plastic casing, creating a slim unified design that tilts only up and down on a simple metal base. The fifth, sixth and seventh revisions swapped the plastic enclosure for metal and became progressively thinner over each revision.
Oval in the context of Ringwork
A ringwork is a form of fortified defensive structure, usually circular or oval in shape. Ringworks are essentially motte-and-bailey castles without the motte. Defences were usually earthworks in the form of a ditch and bank surrounding the site.
Ringworks originated in Germany in the 10th century as an early form of medieval castle and at first were little more than a fortified manor house. They appeared in England just prior to the Norman conquest and large numbers were built during the late 11th and early 12th centuries. More elaborate versions (such as Stansted Mountfitchet Castle) comprise a ringwork and bailey, the ringwork replacing the more usual motte and the bailey acting as a military stronghold.