noun (plural -drons or tetrahedra) Etymology: New Latin, from Late Greek tetraedron, neuter of tetraedros having four faces, from Greek tetra- + hedra seat, face — more at sit Date: 1570 a polyhedron that has four faces

New Collegiate Dictionary. 2001.

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  • Tetrahedron — Beschreibung Fachzeitschrift Fachgebiet Chemie Sprache Englisch V …   Deutsch Wikipedia

  • 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 — solid figure contained by four triangular surfaces, 1560s, from Late Gk. tetraedron, originally neuter of tetraedros (adj.) four sided, from tetra four + hedra seat, base, chair, face of a geometric solid, from PIE root *sed to sit (see SEDENTARY …   Etymology dictionary

  • tetrahedron — ► NOUN (pl. tetrahedra or tetrahedrons) ▪ a solid having four plane triangular faces. DERIVATIVES tetrahedral adjective …   English terms dictionary

  • tetrahedron — [te΄trə hē′drən] n. pl. tetrahedrons or tetrahedra [tet΄rə hē′drə] [ModL < neut. of LGr tetraedros, four sided: see TETRA & HEDRON] a solid figure with four triangular faces: see POLYHEDRON …   English World dictionary

  • 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

  • Tetrahedron — Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Le tétraèdre est un solide composé de quatre triangles. Tetrahedron est une revue scientifique publiant des articles concernant la chimie organique.… …   Wikipédia en Français

  • tetrahedron — /te treuh hee dreuhn/, n., pl. tetrahedrons, tetrahedra / dreuh/. 1. Geom. a solid contained by four plane faces; a triangular pyramid. 2. any of various objects resembling a tetrahedron in the distribution of its faces or apexes. [1560 70; TETRA …   Universalium

  • 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

  • tetrahedron — tet•ra•he•dron [[t]ˌtɛ trəˈhi drən[/t]] n. pl. drons, dra ( drə). 1) math. a solid contained by four plane faces; a triangular pyramid 2) any of various objects resembling a tetrahedron • Etymology: 1560–70; < LGk tetráedron …   From formal English to slang

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