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clast
clast [ klast ] (plural clasts)


noun 
Definition:
 
small piece of rock: a fragment of rock produced by the breaking down of larger rocks
[Mid-20th century. Back-formation <clastic]
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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