torus
noun/ˈtɔrəs/
Frequency rank: #19,131 most common English word
Meaning
A geometric surface shaped like a donut, formed by revolving a circle around an axis in the same plane.

Example sentence
The mathematician explained that the surface of torus can be imagined as a donut-shaped object.
Synonyms & related words
- donut
- ring
- toroid
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