Definitions Found:
burstone
- buhrsburstone
- buhrburstone
- burstonesBURSTONE, a heavy stone
- burrstonea cellular, flinty rock, used for mill stones also BUHR, BUHRSTONE, BURSTONE
- buhrstonea cellular, flinty rock, used for mill stones also BUHR, BURRSTONE, BURSTONE
- burrstonesBURRSTONE, a cellular, flinty rock, used for mill stones also BUHR, BUHRSTONE, BURSTONE
- buhrstonesBUHRSTONE, a cellular, flinty rock, used for mill stones also BUHR, BURRSTONE, BURSTONE