noun, plural fu·sains [fyoo-zeynz, fyoo-zeynz; French fy–zan] /fyuˈzeɪnz, ˈfyu zeɪnz; French füˈzɛ̃/ for 2.
- a fine charcoal used in drawing, made from the wood of the spindle tree.
- a drawing made with this charcoal.
- a blackish-gray, friable component of coal with a silky luster that leaves a charcoallike mark.
- a fine charcoal pencil or stick made from the spindle tree
- a drawing done with such a pencil
- a dull black brittle form of carbon resembling charcoal, found in certain coals