buhrstone

enUK

buhr·stone

also burr·stone B0536200 (bûr′stōn′)n. A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells.

[Variant of burr + stone.]

buhrstone

(ˈbɜːˌstəʊn) ,

burstone

burrstone

n1. (Geological Science) a hard tough rock containing silica, fossils, and cavities, formerly used as a grindstone2. (Mechanical Engineering) a grindstone or millstone made of this rock[C18 burr, perhaps identical to burr¹ (alluding to roughness)]

buhr•stone

(ˈbɜrˌstoʊn)

n. any of various siliceous rocks used for millstones. [1685–95]

单词	buhrstone
释义	buhrstone enUK buhr·stone also burr·stone B0536200 (bûr′stōn′)n. A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells. [Variant of burr + stone.] buhrstone (ˈbɜːˌstəʊn) , burstone or burrstone n1. (Geological Science) a hard tough rock containing silica, fossils, and cavities, formerly used as a grindstone2. (Mechanical Engineering) a grindstone or millstone made of this rock[C18 burr, perhaps identical to burr¹ (alluding to roughness)] buhr•stone (ˈbɜrˌstoʊn) n. any of various siliceous rocks used for millstones. [1685–95] buhrstone enUK buhrstone [′bər‚stōn] (petrology) A silicified fossiliferous limestone with abundant cavities previously occupied by fossil shells. Also known as millstone.
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