from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or shaped like a torus or part of a torus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Pertaining to or shaped like a torus, or a section of a torus; toroidal.
from The Century Dictionary and Cyclopedia
- Of or pertaining to a torus: used in optics in reference to a lens the surface of which is a portion of that of a torus, or solid of revolution generated by rotating a circle about any axis in its plane. See torus, 5.
Sorry, no etymologies found.