Torus

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torus

[′tȯr·əs]
(anatomy)
A rounded protuberance occurring on a body part.
(botany)
The thickened membrane closing a bordered pit.
(mathematics)
The surface of a doughnut-shaped object.
The topological space obtained by identifying the opposite sides of a rectangle.
The group which is the product of two circles.

Torus

 

a geometric solid formed by the rotation of a circle about a line lying in the plane of the circle but not intersecting the circle (see Figure 1). A torus is shaped approximately like a doughnut or a life ring. If the radius of the rotating circle is r and

Figure 1

the distance from the center of the circle to the axis of rotation is a, then the area of the surface of the torus is 4π2ar and the volume of the torus is 2π2ar2. The term “torus” is also applied to the surface bounding such a solid.

torus

torus molding
torus
A bold projecting molding, convex in shape, generally forming the lowest member of a base over the plinth.
References in periodicals archive ?
Torus group chief executive Rob Young, right, .and group chair Graham Burgess
Contract:Golden gates housing trust (gght) part of the torus group are leading a large multi-agency partnership called new leaf to deliver the building better opportunities programme across warrington and cheshire east and west.
Accordingly, the under review of the Glacier Insurance ratings will be resolved when AM Best has assessed the plans that the Torus group has for the company, including reinsurance support provided by its new owner.