ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English rubston, from rubben to rub + ston, stoon stone
: a sandstone or grit for scouring, polishing, or sharpening ; especially : whetstone
ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: Middle English rubston, from rubben to rub + ston, stoon stone
: a sandstone or grit for scouring, polishing, or sharpening ; especially : whetstone
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012