noun
also burrstone or burstone ˈ ̷ ̷ˌ ̷ ̷
Etymology: buhrstone, alteration of burrstone, burstone, probably from burr, bur + stone
1. : a siliceous rock used as a material for millstones
2. : a millstone cut from buhrstone
noun
also burrstone or burstone ˈ ̷ ̷ˌ ̷ ̷
Etymology: buhrstone, alteration of burrstone, burstone, probably from burr, bur + stone
1. : a siliceous rock used as a material for millstones
2. : a millstone cut from buhrstone
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012