fusain

from WordNet (r) 3.0 (2006)

fusain
    n 1: a stick of black carbon material used for drawing [syn:
         {charcoal}, {fusain}]

from The Collaborative International Dictionary of English v.0.48

Fusain \Fu"sain"\, n. [F., the spindle tree; also, charcoal made
   from it.] (Fine 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}.
       [1913 Webster]