pyritohedral, adj.
/puy ruy'teuh hee"dreuhn, peuh-, puy'ruy-/, n. Crystall.
a crystal form of 12 pentagonal faces. Also called pentagonal dodecahedron. See diag. under dodecahedron.
[1865-70; pyrito- (comb. form of PYRITE) + -HEDRON]

* * *

Universalium. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Pyritohedron — Pyr i*to*he dron, n. [Pyrite + Gr. ? base.] (Crystallog.) The pentagonal dodecahedron, a common form of pyrite. [1913 Webster] …   The Collaborative International Dictionary of English

  • Pyritohedron — the other one being cubical.A regular dodecahedron can be formed from a cube in the following way: The top square in the cube is replaced by a roof composed of two pentagons, joined along the top of the roof. The diagonals in the pentagons… …   Wikipedia

  • pyritohedron — pentagoninis dodekaedras statusas T sritis fizika atitikmenys: angl. pentadodecahedron; pentagonal dodecahedron; pyritohedron vok. Pentagondodekaeder, n; Pyritoeder, n rus. пентагональный додекаэдр, m; пентагондодекаэдр, m pranc. dodécaèdre… …   Fizikos terminų žodynas

  • pyritohedron — noun a) an irregular dodecahedron, consisting of identical but irregular pentagons b) the shape of a crystal of pyrite …   Wiktionary

  • pyritohedron — py·ri·to·he·dron …   English syllables

  • pyritohedron — drən sometimes ˌdrän noun (plural pyritohedrons or pyritohedra) Etymology: New Latin, from pyrito (from International Scientific Vocabulary …   Useful english dictionary

  • Dodecahedron — Regular Dodecahedron (Click here for rotating model) Type Platonic solid Elements F = 12, E = 30 V = 20 (χ = 2) Faces by sides 12{5} …   Wikipedia

  • Platonic solid — In geometry, a Platonic solid is a convex polyhedron that is regular, in the sense of a regular polygon. Specifically, the faces of a Platonic solid are congruent regular polygons, with the same number of faces meeting at each vertex; thus, all… …   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

  • Dodecahedron — Do*dec a*he dron, n. [Gr. ?; ? twelve + ? seat, bottom, base: cf. F. dod[ e]ca[ e]dre.] (Geom. & Crystallog.) A solid having twelve faces. [1913 Webster] Note: The regular dodecahedron is bounded by twelve equal and regular pentagons; the… …   The Collaborative International Dictionary of English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”