Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A surface generated by a closed curve rotating about, but not intersecting or containing, an axis in its own plane.
  • noun A solid having such a surface.
  • noun A body having the shape of a toroid.

from The Century Dictionary.

  • Same as toroidal.
  • noun A surface or solid of revolution determined by revolving any closed-plane contour about an axis in its plane which does not intersect it.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun mathematics A surface generated by a closed curve (especially a circle) rotating about, but not intersecting or containing, an axis in its own plane.
  • noun A ring-shaped object whose surface is a torus.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a ring-shaped surface generated by rotating a circle around an axis that does not intersect the circle
  • noun the doughnut-shaped object enclosed by a torus

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[tor(us) + –oid.]

Examples

  • I think you were just missing the need for the patch where the "toroid" was. just a quick Q: why all the UCS changes?

    All Discussion Groups: Message List - root

  • The key component is the car's flywheel accumulator, a washer drum-sized device sitting in the cockpit that stores electrical energy mechanically, in a toroid-shaped mass spinning at up to 38,000 rpm.

    Lessons from the Auto Show

  • In response to a few quick taps of his razor-sharp claws, the darkened screen lit up and displayed what was obviously a highly magnified view of a complex molecular form, its toroid surface studded with innumerable side chains; it reminded Riker of one of the perceptually deceptive drawings of M. C. Escher.

    Star Trek: Typhon Pact: Seize the Fire

  • In response to a few quick taps of his razor-sharp claws, the darkened screen lit up and displayed what was obviously a highly magnified view of a complex molecular form, its toroid surface studded with innumerable side chains; it reminded Riker of one of the perceptually deceptive drawings of M. C. Escher.

    Star Trek: Typhon Pact: Seize the Fire

  • In response to a few quick taps of his razor-sharp claws, the darkened screen lit up and displayed what was obviously a highly magnified view of a complex molecular form, its toroid surface studded with innumerable side chains; it reminded Riker of one of the perceptually deceptive drawings of M. C. Escher.

    Star Trek: Typhon Pact: Seize the Fire

  • X-rays generated by a young star burst nursery around Sag-A however, that "brighter" spherical concentration peeked my curiosity esp. that dark area and jet within the toroid.

    Great Observatories Combine for Stunning Look at Milky Way | Universe Today

  • Pivar's model of development has long been that we achieve the diversity of organismal form by starting with a torus, and that fluid movements and distortions of the toroid form lead to the more elaborate forms at the end of development.

    A Day in Court?

  • The complexity of reliable mini-toroid formation and acceleration with compact, relatively low-cost equipment remains to be determined.

    The Future of Power Generation: Nuclear Fusion

  • I am hoping there is a hint at what is causing that corkscrew spiral emanating from the toroid hole.

    Great Observatories Combine for Stunning Look at Milky Way | Universe Today

  • Now if only those object designators could be superimpose onto this image. i.e. is Sgr A* the presumed center/BH inside what looks to be the donut hole of the "brighter" toroid/sphere in this image?

    Great Observatories Combine for Stunning Look at Milky Way | Universe Today

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