1. • noun - a solid formed by the solidification of a chemical and having a highly regular atomic structure
   • noun - a crystalline element used as a component in various electronic devices
   • noun - a rock formed by the solidification of a substance
   • noun - colorless glass made of almost pure silica
   • noun - glassware made of quartz
   • noun - a protective cover that protects the face of a watch
2. • A homogenous solid formed by a repeating, threedimensional pattern of atoms, ions, or molecules and having fixed distances between constituent parts.
   • The unit cell of such a pattern.
   • A mineral, especially a transparent form of quartz, having a crystalline structure, often characterized by external planar faces.
   • A natural or synthetic crystalline material having piezoelectric or semiconducting properties.
   • An electronic device, such as an oscillator or a detector, using such a material.
   • A high-quality clear, colorless glass.
   • An object, especially a vessel or an ornament, made of such glass.
   • Such objects considered as a group.
   • A clear glass or plastic protective cover for the face of a watch or clock.
   • A stimulant drug, usually methamphetamine, in its powdered form.
3. • n - a transparent mineral

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