Wiktionary
engobe
n. 1 A white or colored clay slip coating applied to a ceramic body to give it decorative color or improved texture. 2 A clay slip which is colored with metal oxides or stains, used for coating the surface of a pot either before or after bisque firing.
Usage examples of "engobe".
There did nevertheless appear throughout the Orient a ware of common clay over which a simple covering of white had been painted, and this slip or engobe of white gave to the variety the name of Oriental engobe.