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.
2.
Geometry.
a.
a doughnut-shaped surface generated by the revolution of a conic, especially a circle, about an exterior line lying in its plane.
b.
the solid enclosed by such a surface.
3.
Botany.
a.
the receptacle of a flower.
b.
a thickening of the wall membrane in the bordered pits occurring in the tracheid cells of the wood of many conifers.
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.