What does "charcoal" mean?

Charcoal: (Fine Arts) Finely prepared charcoal in small sticks, used as a drawing implement. Animal charcoal, a fine charcoal prepared by calcining bones in a closed vessel; -- used as a filtering agent in sugar refining, and as an absorbent and disinfectant. -- Charcoal blacks, the black pigment, consisting of burnt ivory, bone, cock, peach stones, and other substances. -- Charcoal drawing (Fine Arts), a drawing made with charcoal. See Charcoal, 2. Until within a few years this material has been used almost exclusively for preliminary outline, etc., but at present many finished drawings are made with it. -- Charcoal point, a carbon pencil prepared for use un an electric light apparatus. -- Mineral charcoal, a term applied to silky fibrous layers of charcoal, interlaminated in beds of ordinary bituminous coal; -- known to miners as mother of coal.