Buhrstone meaning

bûr'stōn'
A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells.
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A hard, siliceous rock used to make millstones.
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A millstone cut from such a rock.
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Alternative spelling of burrstone.
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Origin of buhrstone

  • Variant of burr stone
    From American Heritage Dictionary of the English Language, 5th Edition