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xenocryst
xen·o·cryst [ zénnə krìst, znə krìst ] (plural xen·o·crysts)


noun 
Definition:
 
crystal foreign to rock: a crystal in an igneous rock introduced from an external source and not crystallized from the magma
[Late 19th century. <xeno- + crystal]
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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