What is the meaning of Pot lead?

Graphite or black lead, often used on the bottoms of racing vessels to diminish friction.
Webster's Revised Unabridged Dictionary
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APAWebster's. (2011). pot lead. Retrieved September 22, 2026, from http://smartdefine.org/pot_lead/definitions/2047912
ChicagoWebster's. 2011. "pot lead" http://smartdefine.org/pot_lead/definitions/2047912 (accessed September 22, 2026).
HarvardWebster's 2011, pot lead, Smart Define, viewed 22 September, 2026, <http://smartdefine.org/pot_lead/definitions/2047912>.
MLAWebster's. "pot lead" 27 May 2011. Web. 22 September 2026. <http://smartdefine.org/pot_lead/definitions/2047912>