torus in German

(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).

(architecture) A large convex molding, typically semicircular in cross section, which commonly projects at the base of a column and above the plinth.