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

Also called buhr, burr.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for burstone

Historical Examples of burstone


British Dictionary definitions for burstone

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