# torus

> English word · Noun · IPA /ˈtɔː.ɹəs/ · frequency rank #49,104

## Definitions
1. The standard representation of such a space in 3-dimensional Euclidean space: a surface or solid formed by rotating a closed curve, especially a circle, about a line which lies in the same plane but does not intersect it (e.g. like a ring doughnut).
2. The standard representation of such a space in 3-dimensional Euclidean space: a surface or solid formed by rotating a closed curve, especially a circle, about a line which lies in the same plane but does not intersect it (e.g. like a ring doughnut).
3. The standard representation of such a space in 3-dimensional Euclidean space: a surface or solid formed by rotating a closed curve, especially a circle, about a line which lies in the same plane but does not intersect it (e.g. like a ring doughnut).
4. A large convex molding, typically semicircular in cross section, which commonly projects at the base of a column and above the plinth.
5. A rounded ridge of bone or muscle, especially one on the occipital bone.
6. The end of the peduncle or flower stalk to which the floral parts (or in the Asteraceae, the florets of a flower head) are attached.
7. The thickening of a membrane closing a wood-cell pit (as of gymnosperm tracheids) having the secondary cell wall arched over the pit cavity.

## Etymology
Borrowed from Latin torus (“a round, swelling, elevation, protuberance”).

## Easily confused with
- **TOS** (https://plainspell.com/en/vs/torus-vs-tos)
- **tru** (https://plainspell.com/en/vs/torus-vs-tru)
- **true** (https://plainspell.com/en/vs/torus-vs-true)
- **tour** (https://plainspell.com/en/vs/torus-vs-tour)
- **toys** (https://plainspell.com/en/vs/torus-vs-toys)
- **toss** (https://plainspell.com/en/vs/torus-vs-toss)
- **Tory** (https://plainspell.com/en/vs/torus-vs-tory)
- **tout** (https://plainspell.com/en/vs/torus-vs-tout)
- **tres** (https://plainspell.com/en/vs/torus-vs-tres)
- **tris** (https://plainspell.com/en/vs/torus-vs-tris)
- **trust** (https://plainspell.com/en/vs/torus-vs-trust)
- **turns** (https://plainspell.com/en/vs/torus-vs-turns)
- **towns** (https://plainspell.com/en/vs/torus-vs-towns)
- **Tours** (https://plainspell.com/en/vs/torus-vs-tours)
- **tyres** (https://plainspell.com/en/vs/torus-vs-tyres)
- **truss** (https://plainspell.com/en/vs/torus-vs-truss)
- **totes** (https://plainspell.com/en/vs/torus-vs-totes)
- **tor** (https://plainspell.com/en/vs/tor-vs-torus)
- **thus** (https://plainspell.com/en/vs/thus-vs-torus)
- **tons** (https://plainspell.com/en/vs/tons-vs-torus)

## Common misspellings (6)
`otrus`, `torrus`, `torsu`, `toruss`, `trous`, `ttorus`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/torus