burstone
or buhr·stone, burr·stone
[ bur-stohn ]
/ ˈbɜrˌstoʊn /
noun
any of various siliceous rocks used for millstones.
a millstone of such material.
Words nearby burstone
burst out,
burst with,
burster,
bursting point,
bursting strength,
burstone,
burt,
burthen,
burton,
burton-upon-trent,
buru
Example sentences from the Web for burstone
With the march of improvement, burstone mills went into the discard.
All About Coffee |William H. UkersRynd, rind, n. in a burstone mill, the iron which supports the upper stone.