- Architecture. a large convex molding, more or less semicircular in profile, commonly forming the lowest molding of the base of a column, directly above the plinth, sometimes occurring as one of a pair separated by a scotia and fillets. and column.
- a doughnut-shaped surface generated by the revolution of a conic, especially a circle, about an exterior line lying in its plane.
- the solid enclosed by such a surface.
- the receptacle of a flower.
- a thickening of the wall membrane in the bordered pits occurring in the tracheid cells of the wood of many conifers.
- Anatomy. a rounded ridge; a protuberant part.
Origin of torus
Examples from the Web for torus
Historical Examples of torus
The lateral arcades have similar capitals but only one torus.
Thalamaflorous, with petals and stamens inserted on the torus or Thalamus.
A beautiful and early example of its use occurs on the torus of the Ionic columns of the Erectheum at Athens.The Archaeology and Prehistoric Annals of Scotland
The Torus or Receptacle of the flower (237, Fig. 223) is the portion which belongs to the stem or axis.
At this time each pistil loosens from the torus and can be easily removed, especially if some animal touch the hooks.Seed Dispersal
William J. Beal
- Also called: tore a large convex moulding approximately semicircular in cross section, esp one used on the base of a classical column
- geometry a ring-shaped surface generated by rotating a circle about a coplanar line that does not intersect the circle. Area: 4π² Rr; volume: 2π² Rr ², where r is the radius of the circle and R is the distance from the line to the centre of the circle
- botany another name for receptacle (def. 2)
- anatomy a ridge, fold, or similar linear elevation
- astronomy a dense ring of gas and dust which surrounds a dying star, containing most of the star's ejected gas
Word Origin for torus
Word Origin and History for torus
1560s, from Latin torus "a swelling, bulge, knot; cushion, couch."
- A bulging or rounded projection or swelling, such as is caused by a bone or muscle.
- A surface generated by rotating a circle about an axis that is in the same plane as the circle but does not intersect it. A torus resembles a donut and is a subtype of toroid.
- The torus-shaped apparatus that contains plasma in nuclear fusion reactors.