Word.ws English Dictionary

Plural of tetrahedron

irregular plural

The plural of tetrahedron is tetrahedra or tetrahedrons.

Forms of tetrahedron

Singulartetrahedron /ˌtɛtɹəˈhiːdɹən/
Pluraltetrahedra
tetrahedrons
Countablecountable

Tetrahedra and tetrahedrons in a sentence

  • Strong frustration of magnetic interactions is combined with the presence of the electric polarization in tetrahedra chains in piipite.2016, L.M. Volkova, D.V. Marinin, “Frustrated antiferromagnetic spin chains of edge-sharing tetrahedra in volcanic minerals…. From the entry piipite
  • The gaps in a face-centered cubic packing of square sharing rhombicuboctahedra can be filled by cubes and tetrahedra (Fig. 2.4(h)).2009, Walter Steurer, Sofia Deloudi, Crystallography of Quasicrystals: Concepts, Methods and Structures, page 55. From the entry rhombicuboctahedron
  • This ideal net gives rise to the formation of B₁₂ truncated tetrahedra, where the A cations are lodged.2000, Angel Vegas, Cations in Inorganic Solids: Crystallography Reviews, volume 7, number 3, page 248. From the entry truncated tetrahedron
  • Caltrops, tetrahedrons, and similar devices are designed to puncture vehicle tires or limit foot traffic.2000, Alan Vick, Aerospace operations in urban environments: exploring new concepts. From the entry caltrop
  • The space of the El Al pyramid is created essentially by the packing of truncated tetrahedrons.1968, Cindy Marriott, A Critical Analysis of Israeli Architecture, 1948-1967: A Study in Cultural Conflict, page 63. From the entry truncated tetrahedron

Meaning of tetrahedron

  1. noun A polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral triangles, is one of the Platonic solids.

Full definition of tetrahedron

Nouns ending in -on: plural -a

Questions about the plural of tetrahedron

What is the plural of tetrahedron?
The plural of tetrahedron is tetrahedra or tetrahedrons.
Which is correct, tetrahedra or tetrahedrons?
Both are used. tetrahedra is the more common of the two in English writing.
Is tetrahedron countable?
Tetrahedron is a countable noun.

Source and license

Adapted from Wiktionary: tetrahedron (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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