burstone
/bur-stohn/US // ˈbɜrˌstoʊn //UK // (ˈbɜːˌstəʊn) //
布尔石,布尔斯通,布尔森,布尔森石
Definitions
n.名词 noun
- 1
- : any of various siliceous rocks used for millstones.
- : a millstone of such material.
Examples
Rynd, rind, n. in a burstone mill, the iron which supports the upper stone.
With the march of improvement, burstone mills went into the discard.
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