You can mark you interesting snippets of text that will be available through a unique link in your browser.


polyhedron

Translation
polyhedron
/pol'ee hee"dreuhn/, n., pl. polyhedrons, polyhedra /-dreuh/.
a solid figure having many faces. See illus. under dodecahedron, icosahedron, octahedron, pentahedron, tetrahedron.
[1560-70; < Gk polýedron, neut. of polýedros having many bases. See POLY-, -HEDRON]

* * *

In Euclidean geometry, a three-dimensional object composed of a finite number of polygonal surfaces (faces).

Technically, a polyhedron is the boundary between the interior and exterior of a solid. In general, polyhedrons are named according to number of faces. A tetrahedron has four faces, a pentahedron five, and so on; a cube is a six-sided regular polyhedron (hexahedron) whose faces are squares. The faces meet at line segments called edges, which meet at points called vertices. See also Platonic solid; Euler's formula.

* * *


Universalium. 2010.

  
Share  

Look at other dictionaries:

  • Polyhedron —   Titre abrégé Polyhedron Discipline Chimie Langue Anglais Directeur de publication …   Wikipédia en Français

  • Polyhedron — Beschreibung Peer Review Fachzeitschrift Fachgebiet Chemie Sprache Englisch …   Deutsch Wikipedia

  • polyhedron — noun многогранник …   Англо-русский словарь Мюллера

  • Polyhedron — Pol y*he dron, n.; pl. E. {Polyhedrons}., L. {Polyhedra}. [NL., fr. Gr. ? with many seats or sides; poly s many + ? a seat or side: cf. F. poly[ e]dre.] 1. (Geom.) A body or solid contained by many sides or planes. [1913 Webster] 2. (Opt.) A… …   The Collaborative International Dictionary of English

  • polyhedron — 1> мат. многогранник, полиэдр …   Новый большой англо-русский словарь

  • Polyhedron — Polyhedra redirects here. For the relational database system, see Polyhedra DBMS. For the game magazine, see Polyhedron (magazine). For the scientific journal, see Polyhedron (journal). Some Polyhedra Dodecahedron (Regular polyhedron) …   Wikipedia

  • polyhedron — многогранник, полиэдр all space polyhedron convex polyhedron regular polyhedron …   Англо-русский словарь технических терминов

  • polyhedron — ˈpɔlɪˈhedrən сущ. политоп, полиэдр, многогранник (математика) многогранник, полиэдр polyhedron (pl ra, s) многогранник …   Большой англо-русский и русско-английский словарь

  • polyhedron — 1) многогранник 2) полиэдр 3) полиэдроид – edge polyhedron – face of polyhedron – integer polyhedron – Voronoy polyhedron neighbouring vertixes of a polyhedron соседние вершины… …   Англо-русский технический словарь

  • polyhedron — noun (plural drons or polyhedra) Etymology: New Latin Date: 1570 a solid formed by plane faces • polyhedral adjective …   New Collegiate Dictionary