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.

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• icosahedron — (n.) 1560s, from Gk. eikosahedron, neuter of eikosahedros, from eikosi twentyá + hedra seat, base, chair, face of a geometric solid, from PIE root *sed to sit (see SEDENTARY (Cf. sedentary)). Greek eikosi is from PIE *wikmti twenty, from …   Etymology dictionary

• icosahedron — ► NOUN (pl. icosahedra or icosahedrons) ▪ a three dimensional shape having twenty plane faces, in particular a regular solid figure with twenty equal triangular faces. DERIVATIVES icosahedral adjective. ORIGIN from Greek eikosaedros twenty faced …   English terms dictionary

• icosahedron — [ī΄kō sə hē′drən] n. pl. icosahedra [ī΄kō sə hē′drə] or icosahedrons [Gr eikosaedron: see ICOSI & HEDRON] a solid figure with twenty plane surfaces icosahedral adj …   English World dictionary

• 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

• 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

• icosahedron — ikosaedras statusas T sritis fizika atitikmenys: angl. icosahedron vok. Ikosaeder, m rus. икосаэдр, m pranc. icosaèdre, m …   Fizikos terminų žodynas

• icosahedron — noun (plural drons or icosahedra) Etymology: Greek eikosaedron, from eikosi twenty + edron hedron more at vigesimal Date: 1570 a polyhedron having 20 faces …   New Collegiate Dictionary

• icosahedron — icosahedral, adj. /uy koh seuh hee dreuhn, uy kos euh /, n., pl. icosahedrons, icosahedra / dreuh/. a solid figure having 20 faces. [1560 70; < Gk eikosáedron, equiv. to eikosa (var. of eikosi , comb. form of eíkosi twenty) + edron HEDRON] * * * …   Universalium

• icosahedron — n. figure that has twenty facets, solid form with twenty faces …   English contemporary dictionary

• icosahedron — [ˌʌɪkɒsə hi:drən, hɛd ] noun (plural icosahedra or icosahedrons) a three dimensional shape having twenty plane faces, in particular a regular solid figure with twelve equal triangular faces. Derivatives icosahedral adjective Origin C16: via late… …   English new terms dictionary