| terra alba | (n) finely pulverized gypsum used especially as a pigment |
| china clay | (n) a fine usually white clay formed by the weathering of aluminous minerals (as feldspar); used in ceramics and as an absorbent and as a filler (e.g., in paper), Syn. terra alba, porcelain clay, kaoline, china stone, kaolin |
| pipeclay | (n) fine white clay used in making tobacco pipes and pottery and in whitening leather, Syn. terra alba |