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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👉 Ovoid in the context of Racket (sports equipment)
A racket or racquet is an item of sporting equipment used to strike a ball or shuttlecock in a variety of sports. A racket consists of three major components: a widened distal end known as the head, an elongated handle known as the grip, and a reinforced connection between the head and handle known as the throat or heart. The head of the racket forms a flattened firm surface, known as the face, which is used to strike the ball or shuttlecock.
In the strictest sense, the word "racket" specifically refers to a striking implement with a mesh face made of interlaced, tightly stretched strings fixed on an ovoid frame known as the rim. This type of racket is used in sports such as tennis, badminton, and racquetball. Some rackets have a rigid one-piece head with a solid or fenestrated face instead of a meshwork of strings. Such rackets are called a paddle or bat, and are used in sports such as table tennis, pickleball and padel. Collectively, sporting games using rackets and paddles are all known as racket sports.
In this Dossier
Ovoid in the context of Ball
A ball is a round object (usually spherical, but sometimes ovoid) with several uses. It is used in ball games, where the play of the game follows the state of the ball as it is hit, kicked or thrown by players. Balls can also be used for simpler activities, such as catch or juggling. Balls made from hard-wearing materials are used in engineering applications to provide very low friction bearings, known as ball bearings. Black-powder weapons use stone and metal balls as projectiles.
Although many types of balls are today made from rubber, this form was unknown outside the Americas until after the voyages of Columbus. The Spanish were the first Europeans to see the bouncing rubber balls (although solid and not inflated) which were employed most notably in the Mesoamerican ballgame. Balls used in various sports in other parts of the world prior to Columbus were made from other materials such as animal bladders or skins, stuffed with various materials.
Ovoid in the context of Pituitary gland
The pituitary gland or hypophysis is an endocrine gland in vertebrates. In humans, the pituitary gland is located at the base of the brain, protruding off the bottom of the hypothalamus. The pituitary gland and the hypothalamus control much of the body's endocrine system. It is seated in part of the sella turcica, a depression in the sphenoid bone, known as the hypophyseal fossa. The human pituitary gland is oval shaped, about 1 cm in diameter, 0.5–1 gram (0.018–0.035 oz) in weight on average, and about the size of a kidney bean.
There are two main lobes of the pituitary, an anterior lobe, and a posterior lobe joined and separated by a small intermediate lobe. The anterior lobe (adenohypophysis) is the glandular part that produces and secretes several hormones. The posterior lobe (neurohypophysis) secretes neurohypophysial hormones produced in the hypothalamus. Both lobes have different origins and they are both controlled by the hypothalamus.