oilstone(redirected from oilstones)
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natural or manufactured stone used as an abrasive solid to sharpen tools. It is used dry, with water, or with oil. Such a stone of the finer grade used with oil is usually called an oilstone.
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A whetstone used with oil.
A fine-grained stone used to impart a sharp edge on tools; oil is used to lubricate the rubbing surface.