Regular tetrahedron
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]

The Collaborative International Dictionary of English. 2000.

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• regular tetrahedron — taisyklingasis tetraedras statusas T sritis fizika atitikmenys: angl. regular tetrahedron vok. reguläres Tetraeder, n rus. правильный тетраэдр, m pranc. tétraèdre régulier, m …   Fizikos terminų žodynas

• regular tetrahedron — noun a tetrahedron with four equilateral triangular faces • Hypernyms: ↑regular polyhedron, ↑regular convex solid, ↑regular convex polyhedron, ↑Platonic body, ↑Platonic solid, ↑ideal solid …   Useful english dictionary

• 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… …   The Collaborative International Dictionary of English

• Tetrahedron — For the academic journal, see Tetrahedron (journal). Regular Tetrahedron (Click here for rotating model) Type Platonic solid Elements F = 4, E = 6 V = 4 (χ = 2) Faces by s …   Wikipedia

• tetrahedron —    A polyhedron with four two dimensional faces, six edges, and six vertices. It is the simplest of all polyhedrons, and is a type of pyramid. The sides of a right tetrahedron are identical equilateral triangles. The regular tetrahedron is one of …   Glossary of Art Terms

• regular convex polyhedron — noun any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent • Syn: ↑regular polyhedron, ↑regular convex solid, ↑Platonic body, ↑Platonic solid, ↑ideal solid • Hypernyms: ↑polyhedron …   Useful english dictionary

• regular convex solid — noun any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent • Syn: ↑regular polyhedron, ↑regular convex polyhedron, ↑Platonic body, ↑Platonic solid, ↑ideal solid • Hypernyms: ↑polyhedron …   Useful english dictionary

• regular polyhedron — noun any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent • Syn: ↑regular convex solid, ↑regular convex polyhedron, ↑Platonic body, ↑Platonic solid, ↑ideal solid • Hypernyms: ↑polyhedron …   Useful english dictionary

• tetrahedron — noun /tɛtrəˈhiːdrən/ a polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral triangles, is one of the Platonic solids. See Also: tetrahedral …   Wiktionary

• regular solid — noun : any of five regular polyhedrons : a regular tetrahedron, hexahedron, octahedron, dodecahedron, or icosahedron …   Useful english dictionary

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