The Collaborative International Dictionary of English v.0.48:
Charcoal \Char"coal`\, n. [See Char, v. t., to burn or to
reduce to coal, and Coal.]
1. Impure carbon prepared from vegetable or animal
substances; esp., coal made by charring wood in a kiln,
retort, etc., from which air is excluded. It is used for
fuel and in various mechanical, artistic, and chemical
2. (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
Charcoal point, a carbon pencil prepared for use in 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.
[1913 Webster] charcoal-gray