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basalt
ba·salt [ bə sáwlt, báy sàwlt ]


noun 
Definition:
 
1. black shiny volcanic rock: a hard, black, often glassy, volcanic rock. It was produced by the partial melting of the Earth's mantle.
2. black unglazed pottery: a hard black unglazed pottery
[Early 17th century. Via Latin basaltes, variant of basanites< Greek basanitēs "very hard stone, touchstone" < Egyptian bakhan "slate"]

ba·sal·tic [ bə sáwltik ] adjective
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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