Cinder

n.
  1. Partly burned or vitrified coal, or other combustible, in which fire is extinct.
  2. A hot coal without flame; an ember.
  3. A scale thrown off in forging metal.
  4. The slag of a furnace, or scoriaceous lava from a volcano.
    5. Cinder frame ,
    a framework of wire in front of the tubes of a locomotive, to arrest the escape of cinders.
    Cinder notch (Metal.),
    the opening in a blast furnace, through which melted cinder flows out.