torus: meaning, definition, pronunciation and examples
C2Technical/Formal
Quick answer
What does “torus” mean?
A three-dimensional geometric shape resembling a ring doughnut or a bicycle tyre tube.
Audio
Pronunciation
Definition
Meaning and Definition
A three-dimensional geometric shape resembling a ring doughnut or a bicycle tyre tube; a surface generated by rotating a circle about an axis in its plane that does not intersect the circle.
1. In anatomy and biology, a rounded swelling or protuberance, such as a muscle or a botanical structure. 2. In architecture, a large, often decorative convex moulding at the base of a column.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage between UK and US English. Both use the term primarily in academic/technical registers.
Connotations
Neutral; purely descriptive of a shape or structure.
Frequency
Equally low-frequency in both dialects, confined to specialised fields.
Grammar
How to Use “torus” in a Sentence
[the] torus [of something]a torus [with a certain property]Vocabulary
Collocations
Examples
Examples of “torus” in a Sentence
verb
British English
- The function can be toroidally mapped, but 'torus' is not used as a verb.
American English
- In topology, we don't 'torus' an object; we say it is toroidal.
adverb
British English
- No adverbial form exists.
American English
- No adverbial form is standard.
adjective
British English
- The torus shape is fundamental to the design of the fusion reactor.
American English
- We studied torus geometries in our calculus class.
Usage
Meaning in Context
Business
Virtually never used.
Academic
Common in mathematics, physics, engineering, biology, and architecture to describe the specific shape or structure.
Everyday
Rare. If used, it's a deliberate, precise reference to the doughnut shape.
Technical
The primary domain of use, especially in geometry, topology, and 3D modelling.
Vocabulary
Synonyms of “torus”
Watch out
Common Mistakes When Using “torus”
- Mispronouncing as /ˈtɒrʊs/ or /ˈtoʊrəs/.
- Using it as a general term for any ring-like object instead of the specific 3D shape.
FAQ
Frequently Asked Questions
A doughnut, a bagel, or a lifebuoy.
No. A circle is a two-dimensional curve. A torus is a three-dimensional surface shaped like a doughnut.
Yes. In anatomy, 'torus' can refer to a rounded protuberance, such as the 'torus tubarius' in the ear or 'torus mandibularis' on the jaw.
The most common adjective is 'toroidal' (e.g., a toroidal field). 'Toric' is also used in specific contexts like 'toric lens' in optics.
Torus is usually technical/formal in register.
Torus: in British English it is pronounced /ˈtɔːrəs/, and in American English it is pronounced /ˈtɔːrəs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think of a TO-Ring US. A 'TORUS' is the shape a 'TO' ring would have if it were a US doughnut.
Conceptual Metaphor
LIFE IS A TORUS (used in some philosophical contexts to imply cyclical, interconnected existence).
Practice
Quiz
In which field is the term 'torus' LEAST likely to be used?