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"china clay," 1727, from French kaolin (1712), from Chinese Kao-ling, old-style transliteration of the name of a mountain in Jiangxi, China (near which it was originally dug up), from Chinese gao "high" + ling "mountain, hill."
kaolin ka·o·lin (kā'ə-lĭn)
A fine white clay that, when powdered, is used as a demulcent and adsorbent and, in dentistry, as an agent that confers opacity and toughness to porcelain teeth.