{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.
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
