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The noun crystal is a singular, common, concrete noun; a word for:

  • a quartz that is transparent;
  • a solid form of a substance or mixture that has a regularly repeating internal arrangement of its atoms and often external plane faces;
  • the transparent cover over a watch or clock dial;
  • an uncountable noun as a word for a clear colorless glass of very good quality; a countable noun for things made of this glass.

The word crystal is also an adjective, used to describe a noun.

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12y ago

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