Toroidal describes something which resembles or relates to a torus or toroid:
- Torus
- Toroid, a doughnut-shaped object which resembles a torus
- Toroidal inductors and transformers, a type of electrical device
- Toroidal and poloidal, directions in magnetohydrodynamics
- Toroidal polyhedron
- Toroidal ring model
- Toroidal coordinates, a three-dimensional orthogonal coordinate system
- Toroidal engine, an internal combustion engine with pistons that rotate within a toroidal space
- Toroidal transmission, toroidal shaped rollers that engage against each other in an infinitely variable manner to provide automatic transmission from engine to drive train
- Toroidal graph, a graph whose vertices can be placed on a torus such that no edges cross
- Toroidal reflector, a parabolic reflector which has a different focal distance depending on the angle of the mirror
- Vortex ring, also known as a toroidal vortex; a toroidal flow in fluid mechanics
- Grid network, known as a toroidal network when an n-dimensional grid network is connected circularly in more than one dimension