: a stone disc that can be turned like a wheel and that is used for sharpening tools, smoothing rough edges, etc.
What made you want to look up grindstone? Please tell us where you read or heard it (including the quote, if possible).
Take Our 10-Question Quiz
The commonly misspelled words quiz
How strong is your vocabulary?
The Vocab Quiz Game for iPhone & iPad
"Incredibly fun and addictive. And informative!" User Review, iTunes