Source : Webster's Revised Unabridged Dictionary (1913)

Valenciennes lace \Va*len`ci*ennes" lace"\ [F.; -- so called
   after the town of Valenciennes.]
   A rich kind of lace made at Valenciennes, in France. Each
   piece is made throughout, ground and pattern, by the same
   person and with the same thread, the pattern being worked in
   the net.