Meaning of burrstone | Babel Free
/ˈbɚstoʊn/Definitions
A tough, silicified limestone formerly used to make millstones, typified by the presence of multiple cavities that originally housed fossilized shells.
countable, uncountable
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.