Definitions
from The Century Dictionary.
- noun A rough, unhewn stone. [Prov. Eng.]
- noun A name given to certain silicious or siliciocalcareous stones, whose dressed surfaces present a bur or keen-cutting texture, which makes them the best kind of millstones.
Etymologies
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Examples
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With the march of improvement, burstone mills went into the discard.
All About Coffee 1909
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For manufacturing purposes, burstone mills were for many years exclusively employed, especially one first known as the Prentiss & Page, and later as the Page mill.
All About Coffee 1909
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