Regular icosahedron
Icosahedron I`co*sa*he"dron, n. [Gr. ?; ? twenty + ? seat, base, fr. ? to sit.] (Geom.) A solid bounded by twenty sides or faces. [1913 Webster]

{Regular icosahedron}, one of the five regular polyhedrons, bounded by twenty equilateral triangules. Five triangles meet to form each solid angle of the polyhedron. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • regular icosahedron — noun an icosahedron with twenty equilateral triangles as faces • Hypernyms: ↑regular polyhedron, ↑regular convex solid, ↑regular convex polyhedron, ↑Platonic body, ↑Platonic solid, ↑ideal solid …   Useful english dictionary

  • Dissected regular icosahedron — See: Vertex figure for Grand antiprism …   Wikipedia

  • Icosahedron — I co*sa*he dron, n. [Gr. ?; ? twenty + ? seat, base, fr. ? to sit.] (Geom.) A solid bounded by twenty sides or faces. [1913 Webster] {Regular icosahedron}, one of the five regular polyhedrons, bounded by twenty equilateral triangules. Five… …   The Collaborative International Dictionary of English

  • Icosahedron — In geometry, an icosahedron (Greek: eikosaedron , from eikosi twenty + hedron seat; IPA|/ˌaɪ.kəʊ.sə.ˈhi.dɹən/; plural: drons, dra IPA|/ dɹə/) isany polyhedron having 20 faces, but usually a regular icosahedron is implied, which has equilateral… …   Wikipedia

  • Regular polyhedron — A regular polyhedron is a polyhedron whose faces are congruent (all alike) regular polygons which are assembled in the same way around each vertex. A regular polyhedron is highly symmetrical, being all of edge transitive, vertex transitive and… …   Wikipedia

  • icosahedron — noun a polyhedron with twenty faces; the regular icosahedron has regular triangles as faces and is one of the Platonic solids. See Also: icosahedral, truncated icosahedron …   Wiktionary

  • 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

  • Regular — Reg u*lar ( l?r), a. [L. regularis, fr. regula a rule, fr. regere to guide, to rule: cf. F. r[ e]gulier. See {Rule}.] [1913 Webster] 1. Conformed to a rule; agreeable to an established rule, law, principle, or type, or to established customary… …   The Collaborative International Dictionary of English

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