Buhrstone

Definitions

  • Webster's Revised Unabridged Dictionary
    • n Buhrstone (Min) A cellular, flinty rock, used for mill stones.
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Century Dictionary and Cyclopedia
    • n buhrstone See burstone.
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Chambers's Twentieth Century Dictionary
    • n Buhrstone bur′stōn a variety of quartz, containing many small empty cells, which give it a peculiar roughness of surface, particularly adapting it for millstones
    • Buhrstone Often Burr′-stone
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Etymology

Webster's Revised Unabridged Dictionary
OE. bur, a whetstone for scythes