Hypertext Webster Gateway: "oilstone"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Whet \Whet\, n.
1. The act of whetting.
2. That which whets or sharpens; esp., an appetizer. ``Sips,
drams, and whets.'' --Spectator.
{Whet slate} (Min.), a variety of slate used for sharpening
cutting instruments; novaculite; -- called also {whetstone
slate}, and {oilstone}.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Oilstone \Oil"stone`\, n.
A variety of hone slate, or whetstone, used for whetting
tools when lubricated with oil.
From WordNet (r) 1.7 (wn)
oilstone
n : a whetstone for use with oil
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