Having a shape like an anchor-ring, or a surface generated by the revolution of a circle about a line in its plane; pertaining to such a surface, or to a family of such surfaces.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. of or relating to or shaped like a toroid; doughnut shaped
Word Usage
"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."