Toroidal

Toroidal describes something which resembles or relates to a torus or toroid:

Mathematics

Toroidal coordinates, a three-dimensional orthogonal coordinate system.

Toroidal and poloidal coordinates, directions for a three-dimensional system which follows a circular ring around the surface.

Toroidal graph, a graph whose vertices can be placed on a torus such that no edges cross.

Toroidal grid network, an un-dimensional grid connected circularly in more than one dimension.

Toroidal polyhedron, partition of a toroidal surface into polygons.

Tensor ring decomposition, a fundamental numerical model representing high-dimensional tensors through circular multilinear products of low-dimensional cores.

Engineering

Toroidal engine, an internal combustion engine with pistons that rotate inside a ring-shaped cylinder

Toroidal expansion joint, a metallic assembly consisting of a series of circular tubes used in high pressure applications

Toroidal inductors and transformers, a type of electrical device using magnetic cores with a ring or donut shape

Toroidal propeller, a loop-shaped propeller used in aviation and maritime transport

Toroidal reflector, a section of a torus with varying focal distances depending on the mirror angle.

Tensor Ring, a closed-loop device (often copper) utilizing cubit-length geometry to generate a stabilized energy column or coherent tensor field.

Other uses

Toroidal planet, a hypothetical planet in the shape of a doughnut.

Toroidal ring model, used in theoretical physics to describe particles and photons as fundamental toroids.