buhrstone

[bur-stohn]

noun

burstone.

burstone

or buhr·stone, burr·stone

[bur-stohn]

noun

any of various siliceous rocks used for millstones.

a millstone of such material.

Origin of burstone

bur(r)⁴ + stone

Also called buhr, burr.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for buhrstone

buhrstone

burstone or burrstone

noun

a hard tough rock containing silica, fossils, and cavities, formerly used as a grindstone

a grindstone or millstone made of this rock

Word Origin for buhrstone

C18 burr, perhaps identical to burr 1 (alluding to roughness)

burstone

noun

a variant spelling of buhrstone

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012