Torus

/ˈtɔː.ɹəs/ noun

noun ·Uncommon ·Advanced level

Meaning at a glance

  • Primary sense: 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).; A topological space which is a product of two circles.
  • Grammar: torus is listed as noun.
  • Nearest alternatives: toroid, bone ridge, bony outgrowth, bony prominence.
  • Useful contrasts: cylinder, depression, disk.
  • Usage evidence: A 4-variable Karnaugh map can be thought of, topologically, as being a torus.

How to use "torus"

  1. Start with the primary definition, then check the part of speech before placing the word in a sentence.
  2. Compare nearby synonyms to make sure "torus" carries the exact meaning, tone, and strength you need.
  3. Use the example sentence as a context check. If your sentence uses the word differently, confirm that the grammar still fits.

Meaning check

  • Does the word fit the sentence's grammar?
  • Does it match the intended tone rather than only the dictionary definition?
  • Would a simpler synonym be clearer for the reader?
  • Is there enough surrounding context to prevent ambiguity?

Source and review context

This entry combines structured lexical data with WordToolSet review checks. Definitions, examples, synonyms, and usage notes may come from different source tables, so the page is designed to show evidence from more than one angle before you rely on "torus" in a final draft.

If a word has several senses, prefer the sense that matches your sentence's grammar and surrounding context. A correct definition can still be the wrong choice when the sentence needs a different register, emphasis, or level of specificity.

Before you rely on this definition

Read the first definition as a starting point, then check the example, synonyms, and part of speech before treating "torus" as the right word for your sentence.

If your draft is formal, technical, persuasive, or sensitive, compare "torus" with a nearby alternative so the final choice matches both meaning and reader expectation.

Compare nearby meanings

  • Use synonyms when you need a softer, stronger, simpler, or more specific word.
  • Use antonyms to check the boundary of the meaning and avoid accidental contrast.
  • Use the example sentence to confirm the word behaves naturally in context.
  • Keep the original wording when a replacement adds complexity without improving precision.

Definition decision workflow

1. Identify the role

Check whether "torus" is acting as noun in your sentence. A definition is only useful when the grammar matches the way the word is being used.

2. Test the nearest option

Compare it with "toroid" and other nearby choices to see whether the sentence needs a softer, stronger, or more familiar word.

3. Confirm with context

Use the example sentence below as an evidence check, then read your own sentence out loud to catch tone or rhythm problems.

Review note: Definition pages are checked for source coverage, sentence evidence, synonym support, and editorial insight before they are treated as approval-ready pages. If the evidence is too thin, the page remains available to users but is kept out of the approval-facing indexed inventory.

Final meaning check

Before publishing a sentence with "torus", ask whether the word helps the reader understand the idea faster. A precise word should reduce confusion, not simply make the sentence look more polished.

When the definition, synonym evidence, and example context point in the same direction, the word is usually a safer choice. When they conflict, revise the sentence or choose a clearer alternative.

Definitions

Noun
  1. 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).; A topological space which is a product of two circles.

    "A 4-variable Karnaugh map can be thought of, topologically, as being a torus."

  2. 2
    commonly the lowest molding at the base of a column wordnet
  3. 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).; A topological space which is a product of two circles.; The product of the specified number of circles. in-compounds, usually
  4. 4
    a ring-shaped surface generated by rotating a circle around an axis that does not intersect the circle wordnet
  5. 5
    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).; A ring-shaped object, especially a large ring-shaped chamber used in physical research.
Show 4 more definitions
  1. 6
    A large convex molding, typically semicircular in cross section, which commonly projects at the base of a column and above the plinth.
  2. 7
    A rounded ridge of bone or muscle, especially one on the occipital bone.

    "While there is a hereditary component to tori, this does not explain all cases. Tori tend to appear more frequently during middle age of life; the torus palatinus is more commonly observed in females, but this is not the case with the torus mandibularis. Certain ethnic groups are more prone to one torus or the other."

  3. 8
    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.
  4. 9
    The thickening of a membrane closing a wood-cell pit (as of gymnosperm tracheids) having the secondary cell wall arched over the pit cavity.

Synonyms

All synonyms
toroidbone ridgebony outgrowthbony prominencecoronadonut

Example

"A 4-variable Karnaugh map can be thought of, topologically, as being a torus."

Common questions

What does "torus" mean?

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).; A topological space which is a product of two circles.

What is a synonym for "torus"?

Common synonyms include: toroid, bone ridge, bony outgrowth, bony prominence, corona, donut.

How do you use "torus" in a sentence?

A 4-variable Karnaugh map can be thought of, topologically, as being a torus.

How do you pronounce "torus"?

Pronounced /ˈtɔː.ɹəs/.

Etymology

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

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