a clay that does not contain iron, suitable for making earthenware, stoneware, and porcelain
potter's clay in American English
noun
a clay, suitably plastic and free of iron and other impurities, for use by potters
Word origin
[1610–20]This word is first recorded in the period 1610–20. Other words that entered Englishat around the same time include: cult, cultivate, integration, system, technical