Word.ws English Dictionary

threeside

threeside noun: any object or shape consisting of three sides; triangle.

Noun

threeside (plural threesides)

  1. (nonstandard, rare) Any object or shape consisting of three sides; triangle.
    • [...] let this base-point be indicated by Ax, while the sixth base-point will be indicated by C. Now [c*] contains a threeside formed by a, [...]1919, Koninklijke Nederlandse Akademie van Wetenschappen, Proceedings of the section of sciences
    • Pappus tells us that Menelaus in his Sphaertca calls the figure in question (the spherical triangle) a 'threeside' [...]1921, Sir Thomas Little Heath, A History of Greek Mathematics

Adjective

threeside (not comparable)

  1. (nonstandard, rare) Having three sides; three-sided, triangular.

Forms of threeside

pluralthreesides
alternative formthree-side

Origin of threeside

From three + side.

Questions about threeside

What does threeside mean?
Threeside means any object or shape consisting of three sides; triangle.
What part of speech is threeside?
Threeside can be a noun or an adjective.
What is the plural of threeside?
The plural of threeside is threesides.

Words near threeside in the dictionary

  1. threes
  2. threescore
  3. threescore and ten
  4. threescore-and-ten
  5. threescores
  6. threeside
  7. threesides
  8. threesies
  9. threesome
  10. threesomeness
  11. threesomes

Source and license

Adapted from Wiktionary: threeside (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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