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| | Crystal (disambiguation) - Wikipedia, the free encyclopedia |
 | | Crystal, in chemistry and mineralogy, a form of matter wherein its molecules are regularly aggregated in a definite internal crystal structure, with the external form of a solid of symmetrically arranged plane faces. |
 | | In electronics, a crystal is a crystalline piece of a semiconductor used in a device, such as a crystal radio receiver, for its properties of electrical conduction. |
 | | Crystal oscillator, in electronics, a device, often used in timekeeping, as in a quartz clock, and in radio transmission, which produces an alternating electric current stabilized by the mechanical resonance of a piezoelectric crystal, usually quartz. |
| en.wikipedia.org /wiki/Crystal_(disambiguation) (308 words) |
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