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précis
precise
precisely
precisian
precision
preclinical
preclude
precocial
precocious
precognition
preconceived
preconception
preconcert
precondition
preconize
preconscious
precontract
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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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