A Topical Dictionary: Search for tetrahedron

Dictionary Results For "tetrahedron" [?]/[OPML]

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English

Image:Tetrahedron.jpg|thumb|A tetrahedron

Etymology

From tetra-, "four" + hedron, "seat".

Pronunciation

IPA: /tɛtrəˈhiːdrən/

Noun

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

Related terms

tetrahedral

Translations

Catalan: {{t|ca|tetràedre|m}}
Czech: {{t-|cs|čtyřstěn|m}}
Finnish:
French: {{t|fr|tetraèdre|m}}
German: {{t-|de|Tetraeder|n}}
Hungarian:
Italian: {{t+|it|tetraedro|m}}

Japanese: {{t|ja|四面体|tr=shimentai|sc=Jpan}}, {{t|ja|三角錐|tr=sankakusui|sc=Jpan}}
Portuguese: {{t+|pt|tetraedro|m}}
Spanish: {{t+|es|tetraedro|m}}
Swedish: {{t+|sv|tetraeder|c}}

Category:English nouns with irregular plurals

fr:tetrahedron io:tetrahedron id:tetrahedron nl:tetrahedron ru:tetrahedron ta:tetrahedron vi:tetrahedron zh:tetrahedron

GNU Project's publication of CIDE, the Collaborative International Dictionary of English Tetrahedron \Tet`ra*he"dron\, n. [Tetra- + Gr. ? seat, base, fr.
? to sit.] (Geom.)
A solid figure inclosed or bounded by four triangles.
[1913 Webster]

Note: In crystallography, the regular tetrahedron is regarded
as the hemihedral form of the regular octahedron.
[1913 Webster]

Regular tetrahedron (Geom.), a solid bounded by four equal
equilateral triangles; one of the five regular solids.
[1913 Webster]

WordNet tetrahedron
n : any polyhedron having four plane faces
[also: tetrahedra (pl)]