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Toroidal describes something which resembles or relates to a torus or toroid:


Mathematics

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Torus In geometry, a torus (plural tori, colloquially donut or doughnut) is a surface of revolution generated by revolving a circle in three-dimensional space about an axis that is coplanar with the circle. If the axis of revolution does n ...
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Toroid In mathematics, a toroid is a surface of revolution with a hole in the middle. The axis of revolution passes through the hole and so does not intersect the surface. For example, when a rectangle is rotated around an axis parallel to one of its ...
, a surface of revolution which resembles a torus *
Toroidal polyhedron In geometry, a toroidal polyhedron is a polyhedron which is also a toroid (a -holed torus), having a topological genus () of 1 or greater. Notable examples include the Császár and Szilassi polyhedra. Variations in definition Toroidal polyh ...
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Toroidal coordinates Toroidal coordinates are a three-dimensional orthogonal coordinate system that results from rotating the two-dimensional bipolar coordinate system about the axis that separates its two foci. Thus, the two foci F_1 and F_2 in bipolar coordina ...
, a three-dimensional orthogonal coordinate system *
Toroidal and poloidal coordinates The terms toroidal and poloidal refer to directions relative to a torus of reference. They describe a three-dimensional coordinate system in which the poloidal direction follows a small circular ring around the surface, while the toroidal direc ...
, directions relative to a torus of reference * Toroidal graph, a graph whose vertices can be placed on a torus such that no edges cross *Toroidal
grid network Elex Media Komputindo is a publishing company in Indonesia which publishes books, comics, magazines, novels and other print media. Established on January 15, 1985, Elex Media Komputindo is a subsidiary of Kompas Gramedia Group. Elex is headquart ...
, where an n-dimensional grid network is connected circularly in more than one dimension


Engineering

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Toroidal inductors and transformers Toroidal inductors and transformers are inductors and transformers which use magnetic cores with a toroidal (ring or donut) shape. They are passive electronic components, consisting of a circular ring or donut shaped magnetic core of ferromag ...
, a type of electrical device * Toroidal and poloidal, directions in magnetohydrodynamics *
Toroidal engine A swing-piston engine is a type of internal combustion engine in which the pistons move in a circular motion inside a ring-shaped "cylinder", moving closer and further from each other to provide compression and expansion. Generally two sets of pis ...
, an internal combustion engine with pistons that rotate within a toroidal space *Toroidal CVT, a type of continuously variable transmission *
Toroidal reflector A toroidal mirror is a reflector whose surface is a section of a torus, defined by two radii of curvature. Such reflectors are easier to manufacture than mirrors with a surface described by a paraboloid or ellipsoid. They suffer from spherical abe ...
, a parabolic reflector which has a different focal distance depending on the angle of the mirror


Other uses

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Toroidal ring model The toroidal ring model, known originally as the Parson magneton or magnetic electron, is a physical model of subatomic particles. It is also known as the plasmoid ring, vortex ring, or helicon ring. This physical model treated electrons and pr ...
in theoretical physics * Vortex ring, also known as a toroidal vortex; a toroidal flow in fluid mechanics


See also

* Atoroidal * Torus (disambiguation) {{Disambiguation