Definition of "toroidal" [toroidal]

• Having the shape of a torus or toroid (adjective)

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• "Toroidal: -- Another type of retardation coil, called the toroidal type due to the fact that its core is a torus formed by winding a continuous length of fine iron wire, is shown in diagram in Fig. 104."
• "The December experiment shows a more or less conventional DC motor with a permanent magnet rotor and a stator wound with toroidal coils; this is an odd choice since toroidal wound coils produce a small external magnetic field and so make very inefficient motors."
• "All of LM's pressurized compartments were spherical, toroidal or cylindrical, including the crew compartment, the forward portion being a wide flat cylinder and the aft being basically cylindrical with cutouts and reinforcement for the hatch on top and the engine on the bottom."