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Concreted earthy or mineral matter; rock.
(noun)
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Such concreted matter of a particular type. Often used in combination: sandstone; soapstone.
(noun)
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A small piece of rock.
(noun)
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Rock or a piece of rock shaped or finished for a particular purpose, especially:
(noun)
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A piece of rock that is used in construction: a coping stone; a paving stone.
(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.