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bursary
burse
bursitis
burst
burst into
burst out
bursting
bursting disk
burstone
bursty
burthen
Burton
burton
Burton-upon-Trent
Burundi
Bury
bury
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burstone
bur·stone


noun 
Definition:
 
geology 
Another spelling of  buhrstone
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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