Toroidal describes something which resembles or relates to a torus or toroid: Mathematics Torus Toroid, a surface of revolution which resembles a torus Toroidal polyhedron Toroidal coordinates, a three-dimensional orthogonal coordinate system Toroidal and poloidal coordinates, directions relative to a torus of reference Toroidal graph, a graph whose vertices can be placed on a torus such that no edges cross Toroidal grid network, where an n-dimensional grid network is connected circularly in more than one dimension Engineering Toroidal inductors and transformers, a type of electrical device Toroidal and poloidal, directions in magnetohydrodynamics Toroidal engine, an internal combustion engine with pistons that rotate within a toroidal space Toroidal CVT, a type of continuously variable transmission Toroidal reflector, a parabolic reflector which has a different focal distance depending on the angle of the mirror Other uses Toroidal ring model in theoretical physics Vortex ring, also known as a toroidal vortex; a toroidal flow in fluid mechanics See also Atoroidal Torus (disambiguation)