What is the meaning of Rubstone?

(n.) A stone for scouring or rubbing; a whetstone; a rub.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). rubstone. Retrieved September 20, 2026, from http://smartdefine.org/rubstone/definitions/2056890
ChicagoWebster's. 2011. "rubstone" http://smartdefine.org/rubstone/definitions/2056890 (accessed September 20, 2026).
HarvardWebster's 2011, rubstone, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/rubstone/definitions/2056890>.
MLAWebster's. "rubstone" 28 May 2011. Web. 20 September 2026. <http://smartdefine.org/rubstone/definitions/2056890>