TOROID
Toroid
In mathematics, a toroid is a doughnut-shaped object, such as an O-ring. It is a ring form of a solenoid. Its annular shape is generated by revolving a plane geometrical figure about an axis external to that figure which is parallel to the plane of the figure and does not intersect the figure. When a rectangle is rotated around an axis parallel to one of its edges, then a hollow cylinder is produced.The above text is a snippet from Wikipedia: Toroid
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toroid
Noun
- A surface generated by a closed curve (especially a circle) rotating about, but not intersecting or containing, an axis in its own plane.
- A ring-shaped object whose surface is a torus.
The above text is a snippet from Wiktionary: toroid
and as such is available under the Creative Commons Attribution/Share-Alike License.