oilstone

A fine-grained whetstone lubricated with oil, used for fine sharpening.

To rub, or sharpen or polish by rubbing, on an oilstone.

A slab of fine-grained stone used for imparting a keen edge to tools, and so called because oil is used for lubricating its rubbing-surface. Fine oilstones are often made of novaculite, a fine-grained variety of quartz.

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

A type of stone used for sharpening objects such as knives and razorblades.

a whetstone for use with oil