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crys·tal

crystal

 
 
pronunciation:
krI stl
features:
Word History, Word Explorer
part of speech: noun
definition 1: a type of clear rock that has many flat surfaces. Diamonds and grains of salt are crystals.
The beautiful stone they found was some type of crystal, but it wasn't a diamond.
 
definition 2: glass of very high quality.
That beautiful vase is made of crystal.
derivation: crystallike (adj.)
Word History
Crystal comes from a Greek word that means "clear ice."
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See
  rock, stone