toroid

noun

to·​roid ˈtȯr-ˌȯid How to pronounce toroid (audio)
1
: a surface generated by a closed plane curve rotated about a line that lies in the same plane as the curve but does not intersect it
2
: a body whose surface has the form of a toroid

Examples of toroid in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The toroids are then slammed together at more than1.6 million kilometers per hour. IEEE Spectrum, 26 Nov. 2014 Plasma fuel forms stable toroids at either end of a chamber. IEEE Spectrum, 26 Nov. 2014 So, although the vacuum vessel is still basically a toroid, the magnets that loop around the tube are not planar. Chris Lee, Ars Technica, 9 June 2017

Word History

Etymology

New Latin torus

First Known Use

1886, in the meaning defined at sense 1

Time Traveler
The first known use of toroid was in 1886

Browse Nearby Words

Cite this Entry

“Toroid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/toroid. Accessed 30 Mar. 2025.

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!