bluestone
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blue·stone
(blo͞o′stōn′)n.
1. A bluish-gray sandstone used for paving and building.
2. A stone similar to this kind of sandstone.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
bluestone
(ˈbluːˌstəʊn)n
1. (Geological Science) a blue-grey sandstone containing much clay, used for building and paving
2. (Elements & Compounds) the blue crystalline form of copper sulphate
3. (Geological Science) a blue variety of basalt found in Australia and used as a building stone
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
blue•stone
(ˈbluˌstoʊn)n.
a bluish sandstone.
[1645–55]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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Noun 1. bluestone - bluish-grey sandstone used for paving and building
sandstone - a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.)
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