1. 1. A homogenous solid formed by a repeating, three-dimensional pattern of atoms, ions, or molecules and having fixed distances between constituent parts. 2. The unit cell of such a pattern. 2. A mineral, especially a transparent form of quartz, having a crystalline structure, often characterized by external planar faces. 3. 1. A natural or synthetic crystalline material having piezoelectric or semiconducting properties. 2. An electronic device, such as an oscillator or detector, using such a material. 4. 1. A high-quality, clear, colorless glass. 2. An object, especially a vessel or ornament, made of such glass. 3. Such objects considered as a group. 5. A clear glass or plastic protective cover for the face of a watch or clock. 6. Slang. A stimulant drug, usually methamphetamine, in its powdered form.
adj.
Clear or transparent: a crystal lake; the crystal clarity of their reasoning.
[Middle English cristal, from Old French, from Latin crystallum, from Greek krustallos, ice, crystal.]
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Requesting assistance in finding lost wordVoted for by cafegroundzero.
My dear friends and acquaintances, strangers and former enemies:
I'm looking for a lost word. I found it last night, but forgot to bookmark it or write it down. This morning I checked the place where the dictionary was. Apparently my wife moved the dictionary, and now I can't find it.
It might start with the letter "s" and it means a structure which is bi-symmetrical in perfection.
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