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rtificial, used for whetting, or sharpening, edge tools. The dullness of the fools is the whetstone of the wits. Shak. Diligence is to the understanding as the whetstone to the razor. South.

Pertaining to whetstones; like or suitable for whetstones.

A variety of hone slate, or whetstone, used for whetting tools when lubricated with oil.

mia and Auvergne, and used for polishing glass, marble, and metals. (b) A kind of hone or whetstone; hone slate. -- Polishing snake, a tool used in cleaning lithographic stones. -- Polishing wheel, a wheel or disk coated with, or composed of, abrading material, for polishing a surface.

A stone, commonly flat, used to sharpen cutting tools; a whetstone; -- called also rubstone. Rub iron, an iron guard on a wagon body, against which a wheel rubs when cramped too much.

A whetstone; a rubstone.

A stone for scouring or rubbing; a whetstone; a rub.

A stone for sharpening scythes; a whetstone.

A kind of hone slate or whetstone obtained in Scotland.

), a variety of slate used for sharpening cutting instruments; novaculite; -- called also whetstone slate, and oilstone.