crystal - définition. Qu'est-ce que crystal
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Qu'est-ce (qui) est crystal - définition

SOLID MATERIAL WHOSE CONSTITUENT ATOMS, MOLECULES, OR IONS ARE ARRANGED IN AN ORDERED PATTERN EXTENDING IN ALL THREE SPATIAL DIMENSIONS
Crystals; Crystalline; Crystalline rock; Crystels; Crystalline Rock; Crystallisation point; Crystal (mineral); Morphous solid; Crystalline solid; Crystalline Solid; Crystal phase; Crystal form; Crystalline solids; Crystaline solid; Crystaline solids; Xtal; Cryſtal; Crystel; Crystallographic form
  • cooling crystallizer]] in a beet sugar factory.
  • Crystals of [[amethyst]] [[quartz]]
  • shell]] with [[calcite]] crystals
  • stable]] faces, where new atoms cannot as easily attach themselves.
  • periodic]] arrangement; a [[polycrystal]] is composed of many microscopic crystals (called "[[crystallite]]s" or "grains"); and an [[amorphous]] solid (such as [[glass]]) has no periodic arrangement even microscopically.
  • pentagonal dodecahedron]]. Only quasicrystals can take this 5-fold symmetry.  The edges are 2 mm long.
  • [[Ice]] crystals
  • Twinned]] [[pyrite]] crystal group.
  • Two types of crystallographic defects. <u>Top right:</u> [[edge dislocation]]. <u>Bottom right:</u> [[screw dislocation]].

Crystal         
Concurrent Representation of Your Space-Time ALgorithms. A recursion equation parallel language. ["A Parallel Language and its Compilation to Multiprocessor Machines or VLSI", M.C. Chen, 13th POPL, ACM 1986 pp.131-139]. (1994-12-06)
Crystal         
·noun The glass over the dial of a watch case.
II. Crystal ·noun Anything resembling crystal, as clear water, ·etc.
III. Crystal ·adj Consisting of, or like, crystal; clear; transparent; lucid; pellucid; crystalline.
IV. Crystal ·noun A species of glass, more perfect in its composition and manufacture than common glass, and often cut into ornamental forms. ·see Flint glass.
V. Crystal ·noun The regular form which a substance tends to assume in solidifying, through the inherent power of cohesive attraction. It is bounded by plane surfaces, symmetrically arranged, and each species of crystal has fixed axial ratios. ·see Crystallization.
VI. Crystal ·noun The material of quartz, in crystallization transparent or nearly so, and either colorless or slightly tinged with gray, or the like;
- called also rock crystal. Ornamental vessels are made of it. ·cf. Smoky quartz, Pebble; also Brazilian pebble, under Brazilian.
crystal         
(crystals)
Frequency: The word is one of the 3000 most common words in English.
1.
A crystal is a small piece of a substance that has formed naturally into a regular symmetrical shape.
...salt crystals.
...a single crystal of silicon.
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2.
Crystal is a transparent rock that is used to make jewellery and ornaments.
...a strand of crystal beads.
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3.
Crystal is a high quality glass, usually with patterns cut into its surface.
Some of the finest drinking glasses are made from lead crystal.
...crystal glasses.
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4.
Glasses and other containers made of crystal are referred to as crystal.
Get out your best china and crystal.
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Wikipédia

Crystal

A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macroscopic single crystals are usually identifiable by their geometrical shape, consisting of flat faces with specific, characteristic orientations. The scientific study of crystals and crystal formation is known as crystallography. The process of crystal formation via mechanisms of crystal growth is called crystallization or solidification.

The word crystal derives from the Ancient Greek word κρύσταλλος (krustallos), meaning both "ice" and "rock crystal", from κρύος (kruos), "icy cold, frost".

Examples of large crystals include snowflakes, diamonds, and table salt. Most inorganic solids are not crystals but polycrystals, i.e. many microscopic crystals fused together into a single solid. Polycrystals include most metals, rocks, ceramics, and ice. A third category of solids is amorphous solids, where the atoms have no periodic structure whatsoever. Examples of amorphous solids include glass, wax, and many plastics.

Despite the name, lead crystal, crystal glass, and related products are not crystals, but rather types of glass, i.e. amorphous solids.

Crystals, or crystalline solids, are often used in pseudoscientific practices such as crystal therapy, and, along with gemstones, are sometimes associated with spellwork in Wiccan beliefs and related religious movements.

Exemples du corpus de texte pour crystal
1. CRYSTAL AURA Swarovski and Avon have created Crystal Aura eau de parfum, the newest fragrance.
2. Liverpool 1 Crystal Palace 2 November 2 1''1 First Division Liverpool 3 Crystal Palace 0 April 23 1''1 First Division Crystal Palace 4 Liverpool 3 May 8 1''0 FA Cup Crystal Palace 0 Liverpool 2 January 20 1''0 First Division Liverpool ' Crystal Palace 0 September 12 1'8' First Division You‘ve read the piece, now have your say.
3. Her crystal figurines of unicorns and teddy bears lay broken.
4. "The message must stay very crystal clear and it is.
5. The crystal ballroom features both flying and disco–dancing skeletons.