Word Origin & History
porcelainc.1530, from M.Fr. porcelaine, from It. porcellana "porcelain" (13c.), lit. "cowrie shell," the chinaware so called from resemblance to the shiny surface of the shells. The shell's name in It. is from porcella "young sow," fem. of L. porcellus "young pig," dim. of porculus "piglet," dim. of porcus "pig."
Supposedly the shells were so called because the shape of the orifice reminded someone of the vaginas of pigs.