crystal

n. transparent mineral (especially a type of quartz); type of clear glass

CRYSTAL is a quantum chemistry ab initio program, designed primarily for calculations on crystals (3 dimensions), slabs (2 dimensions) and polymers (1 dimension) using translational symmetry, but it can be used for single molecules. It is written by V.R. Saunders, R. Dovesi, C. Roetti, R. Orlando, C.M. Zicovich-Wilson, N.M. Harrison, K. Doll, B. Civalleri, I.J. Bush, Ph. D’Arco, and M. Llunell from Theoretical Chemistry Group at the University of Torino and the Computational Materials Science Group at the Daresbury Laboratory near Warrington in Cheshire, England. The current version is CRYSTAL06. Earlier versions were CRYSTAL92, CRYSTAL95, CRYSTAL98 and CRYSTAL03.
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In chemistry and mineralogy, a crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions.The word crystal originates from the Greek word "Krystallos" meaning clear ice, as it was thought to be an especially solid form of water. The word once referred particularly to quartz, or "rock crystal". Most metals encountered in everyday life are  polycrystals. Crystals are often symmetrically intergrown to form crystal twins.'''
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Noun
1. a solid formed by the solidification of a chemical and having a highly regular atomic structure
(hypernym) solid
(hyponym) snowflake, flake
(derivation) crystallize, crystallise, crystalize, crystalise
2. a crystalline element used as a component in various electronic devices
(hypernym) component, constituent, element
(hyponym) piezoelectric crystal
(part-holonym) crystal counter
3. a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces
(synonym) crystallization
(hypernym) rock, stone
(hyponym) crystallite
(derivation) crystallize, crystallise, crystalize, crystalise
4. colorless glass made of almost pure silica
(synonym) quartz glass, quartz, vitreous silica, lechatelierite
(hypernym) natural glass
(derivation) crystallize, crystallise, crystalize, crystalise
5. glassware made of quartz
(hypernym) glassware, glasswork
6. a protective cover that protects the face of a watch
(synonym) watch crystal, watch glass
(hypernym) protective covering, protective cover, protection
(part-holonym) watch, ticker

(n.)
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.
  

(n.)
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.
  

(n.)
The glass over the dial of a watch case.
  

(n.)
Anything resembling crystal, as clear water, etc.
  

(n.)
A species of glass, more perfect in its composition and manufacture than common glass, and often cut into ornamental forms. See Flint glass.
  

(a.)
Consisting of, or like, crystal; clear; transparent; lucid; pellucid; crystalline.
  

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)