Definition of toris:
(n) :
(geometry) The standard representation of such a space in 3-dimensional Euclidean space: a surface or solid formed by rotating a closed curve, especially a circle, about a line which lies in the same plane but does not intersect it (e.g. like a ring doughnut).
(n) :
(topology) A topological space which is a product of two circles.
(n) :
(topology, in combination, n-torus, 4-torus, etc.) The product of the specified number of circles.
(n) :
A ring-shaped object, especially a large ring-shaped chamber used in physical research.
(n) :
(architecture) A large convex molding, typically semicircular in cross section, which commonly projects at the base of a column and above the plinth.
(n) :
(anatomy) A rounded ridge of bone or muscle, especially one on the occipital bone.