crystal

1. 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. Source: opted

2. 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. Source: opted

3. n. A species of glass, more perfect in its composition and manufacture than common glass, and often cut into ornamental forms. See Flint glass. Source: opted

4. n. The glass over the dial of a watch case. Source: opted

5. n. Anything resembling crystal, as clear water, etc. Source: opted

6. a. Consisting of, or like, crystal; clear; transparent; lucid; pellucid; crystalline. Source: opted

7. n. a solid formed by the solidification of a chemical and having a highly regular atomic structure Source: wordnet

8. n. a crystalline element used as a component in various electronic devices Source: wordnet

9. n. a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces Source: wordnet

10. n. colorless glass made of almost pure silica Source: wordnet

11. n. glassware made of quartz Source: wordnet

12. n. a protective cover that protects the face of a watch Source: wordnet

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