ball clay
noun Ceramics.
a fine dark kaolinic clay that turns white or nearly white when fired, used in the manufacture of a wide variety of ceramic wares in combination with other clays for its exceptional bonding properties and plasticity.
Origin of ball clay
First recorded in 1805–15
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019