Source : Webster's Revised Unabridged Dictionary (1913)

Fusain \Fu"sain"\, n. [F., the spindle tree; also, charcoal made
   from it.] (Eine Arts)
   (a) Fine charcoal of willow wood, used as a drawing
       implement.
   (b) A drawing made with it. See {Charcoal}, n. 2, and
       {Charcoal drawing}, under {Charcoal}.

Source : WordNet®

fusain
     n : a stick of black carbon material used for drawing [syn: {charcoal}]