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isometric system

also called  Cubic System,

one of the crystal systems to which a given crystalline solid can be assigned. Crystals in this system are referred to three mutually perpendicular axes of equal lengths. If the atoms or atom groups in the solid are represented by points and the points are connected, the resulting lattice will consist of an orderly stacking of blocks, or unit cells. The isometric unit cell is distinguished by four lines, called axes of threefold symmetry, about which the cell can be rotated by 120° without changing its appearance. This characteristic requires that the cell be a perfect cube; the threefold axes are the diagonals of the cube.

A cube has six square faces, but many of the crystal forms in the isometric system display more complex configurations; among the most symmetrical forms of the isometric (or cubic) system are the octahedron (8 faces), trisoctahedron (24 faces), and hexoctahedron (48 faces).

Only a small fraction of the thousands of recognized crystalline solids are included in the isometric system. Some of these are sodium chloride (table salt), copper, gold, silver, platinum, iron, fluorite, leucite, diamond, garnet, spinel, pyrite, galena, and magnetite.

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Universalium. 2010.

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• isometric system — noun : a crystal system characterized by three equal axes at right angles (as in the cube and regular octahedron) see crystal system illustration …   Useful english dictionary

• The Isometric system — Crystallization Crys tal*li*za tion (kr[i^]s tal*l[i^]*z[=a] sh[u^]n), n. [Cf. F. cristallization.] 1. (Chem. & Min.) The act or process by which a substance in solidifying assumes the form and structure of a crystal, or becomes crystallized; the …   The Collaborative International Dictionary of English

• Isometric exercise — or isometrics are a type of strength training in which the joint angle and muscle length do not change during contraction (compared to concentric or eccentric contractions, called isotonic movements). Isometrics are done in static positions,… …   Wikipedia

• Isometric — I so*met ric, Isometrical I so*met ric*al, a. [Iso + Gr. me tron measure.] 1. Pertaining to, or characterized by, equality of measure. [1913 Webster] 2. (Crystallog.) Noting, or conforming to, that system of crystallization in which the three… …   The Collaborative International Dictionary of English

• Isometric lines — Isometric I so*met ric, Isometrical I so*met ric*al, a. [Iso + Gr. me tron measure.] 1. Pertaining to, or characterized by, equality of measure. [1913 Webster] 2. (Crystallog.) Noting, or conforming to, that system of crystallization in which the …   The Collaborative International Dictionary of English

• isometric exercise — i so*met ric ex er*cise, n. A system of exercise to strengthen specific muscles of the body by pushing parts of the body (such as the two hands) strongly against each other, or against a fixed object, so that the muscles are strongly stressed,… …   The Collaborative International Dictionary of English

• Isometric — The term isometric comes from the Greek for having equal measurement .isometric may mean: * Isometric projection (or “isometric perspective”), a method for the visual representation of three dimensional objects in two dimensions; a form of… …   Wikipedia

• isometric — isometrically, adv. /uy seuh me trik/, adj. Also, isometrical. 1. of, pertaining to, or having equality of measure. 2. of or pertaining to isometric exercise. 3. Crystall. noting or pertaining to that system of crystallization that is… …   Universalium

• isometric — i•so•met•ric [[t]ˌaɪ səˈmɛ trɪk[/t]] adj. Also, i so•met′ri•cal. 1) math. of, pertaining to, or having equality of measure 2) cvb of or pertaining to isometric exercise 3) cry noting or pertaining to a system of crystallization that is… …   From formal English to slang

• isometric — 1. adjective /ˌaɪ.səʊˈmɛt.ɹɪk,ˌaɪ.soʊˈmɛt.ɹɪk,ˌaɪ.səˈmɛt.ɹɪk/ a) Of, or exhibiting equality in dimensions. Antonyms include tonic movements auxotonic and isotonic which are divided into concentric and eccentric. b) Of, or being a …   Wiktionary