What term refers to liquid clay used in pottery?

The term that refers to liquid clay used in pottery is slip. Slip is a mixture of clay and water that has a pourable consistency, making it ideal for various applications in ceramics. It can be used for decorating surfaces, acting as a bonding agent between clay pieces, or as a medium for casting shapes in molds.

While glaze is also a liquid applied to ceramics, its purpose is to create a glass-like finish when fired, differing significantly from the primary use of slip. Crackle refers to a specific technique in which a surface is intentionally cracked for aesthetic purposes, and engobe is a type of colored slip used to coat pottery before glazing, rather than the liquid clay itself. Thus, slip remains the correct term for liquid clay used specifically in pottery practices.