prepared chalk

noun

Medical Definition of prepared chalk

: finely ground native calcium carbonate that is freed of most of its impurities by elutriation and used especially in dentistry for polishing

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“Prepared chalk.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/prepared%20chalk. Accessed 24 Nov. 2020.

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