Bat: A disk of plaster or wood to support clay while throwing a flat piece
Bisque: The first firing to make the clay permanent.
Center: First step in throwing a pot, when the clay is even and smooth on the wheel.
Clear glaze: Chemicals applied to biqued piece, over slip or underglaze, to seal and protect the design.
Cone 04 to 06: The temperature range (about 1865 Degree Farenheit) to which earthenware and terracotta clay is bique and glaze fired.
Earthenware: Low fire clay, earthenware or terracotta
Electric fired: Clay is matured in a ceramic oven heated with electric coils.
Kiln: A ceramic oven. Can be fueled with wood, gas, dung or electricity
Mason Stains: Commerically mixed colorants that are made to a prescribed formula so they are always the same
Pottery wheel: Machine used in the shaping (throwing) of round ceramic ware.
Slip: Liquid clay screened smooth with the addition of Mason Stain (colorant)
Slip Trailing: the application of lines of slip to a clay surface using a fine-pointed dispenser. Plastic squirt bottle in US. Bull's horn in Romania.
Sgrafitto: scratch through layer of underglaze or slip to reveal the clay color below.
Terracotta: Type of earthenware clay with red iron. Fires the color of a red clay flower pot.
Throwing off the hump (or mound): Centering and throwig only the top section of a mound of clay. After cutting off the thrown pot, more clay is brought up, centered and another pot made. Usually used for making bowls.