noun
Usage: usually capitalized I
1. : a manufactured abrasive material
2. : a grinding wheel or whetstone or similar tool made of India oilstone
noun
Usage: usually capitalized I
1. : a manufactured abrasive material
2. : a grinding wheel or whetstone or similar tool made of India oilstone
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012