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| a flat stone for sharpening edged tools or knives | |||
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| a primitive stone artifact (usually made of sandstone) used as an abrader | |||
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| a whetstone made of fine gritstone; used for sharpening razors | |||
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| one of a pair of heavy flat disk-shaped stones that are rotated against one another to grind the grain | |||
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| a revolving stone shaped like a disk; used to grind or sharpen or polish edge tools |