oilstone

[ oil-stohn ]
/ ˈɔɪlˌstoʊn /
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noun

a block of fine-grained stone, usually oiled, for putting the final edge on certain cutting tools by abrasion.

Origin of oilstone

First recorded in 1575–85; oil + stone
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for oilstone

oilstone

/ (ˈɔɪlˌstəʊn) /

noun

a stone with a fine grain lubricated with oil and used for sharpening cutting toolsSee also whetstone
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012