burrstone
/ˈbɜrˌstoʊn/
noun
- A hard, rough stone used for grinding grain, especially in a mill.
- The museum displayed a massive burrstone from a 19th-century gristmill.
- Burrstone wheels were essential for sharpening tools in the past.
- The old mill still uses a burrstone to grind wheat into flour.
Synonyms