Burrstone definitions

burrstone

type of rock used to make millstones
Found on http://phrontistery.info/b.html

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Burrstone

• (n.) See Buhrstone.
Found on http://thinkexist.com/dictionary/meaning/burrstone/

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Burrstone

Burr'stone` noun See Buhrstone .
Found on http://www.encyclo.co.uk/webster/B/116

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