The Collaborative International Dictionary of English v.0.48:

faience \faience\, Faience \Fa`["i]*ence"\, n. [F., fr. Faenza,
   a town in Italy, the original place of manufacture.]
   Glazed earthenware; esp., a fine variety that which is
   decorated with colorful designs in an opaque glaze.
   [1913 Webster +PJC]

WordNet (r) 3.0 (2006):

faience
    n 1: glazed earthenware decorated with opaque colors