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 ?
Pietro Innocenzi Trading Post WHILE King Torus was easily the most spectacular winner last week, I'm not getting carried away with the Vintage Stakes scorer as still fresh in the memory is his narrow victory in the Superlative Stakes last month which was a shade fortunate as the runnerup hung all over the place.
Designed for a special education environment, TORUS avoided cataloging the arcane or exotic bugs that were part of the BUGGY database.
O'Donohoe joined Torus in 2009 as chief underwriting officer, global specialty and chief operating officer of Torus in the United Kingdom and Europe.
These actions follow the completion of Torus National's acquisition by Torus from TIG Insurance Co, a holding company that is ultimately owned by Fairfax Financial Holdings Ltd (TSE:FFH), the agency said.
[3] Peculiar small polyps have been found in the tubal ostium, on the torus tubarius, and in Rosenmuller's fossa.
In Pakistan, no independent studies for torus palatinus have been done.
We, along with other laboratories, have investigated the systematic distribution of the torus among genera within the family (Ohtani, 1983; Rabaey et at, 2008; Dute et at, 2008).
The rating actions follow the completion of Torus National's acquisition in July 2010 by Torus Specialty Insurance Co, a subsidiary of Torus Insurance Holdings Ltd (Torus), from TIG Insurance Co, a holding company that is ultimately owned by Fairfax Financial Holdings Ltd (TSE:FFH), the analysts explained.
A small patch of a sphere or torus surface looks almost like a piece of a flat plane and has area rather than volume.
Serra introduced a new form in this exhibition, the torus, defined in the catalogue as a plane that would describe the curving outer surface of a doughnut's hole.
The objective of this study was to determine the prevalence of torus palatanis and torus mandibularis in relation to age and gender among patients who attended Dental Department of Queen Alia Military Hospital in Jordan.
At NPE, Torus will also demonstrate the B303 bottle burst gauge and will offer information on its other equipment, including the B301 semiautomatic preform gauge and B304 topload & volume gauge.