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precess
precession
precession of the equinoxes
precinct
preciosity
precious
precious coral
precious metal
precious stone
precipice
precipitant
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precipitation
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precious stone
pre·cious stone (plural pre·cious stones)


noun 
Definition:
 
gemstone: a relatively rare and valuable mineral used in jewelry, e.g. a diamond or ruby
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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