[mass noun]a porous black solid, consisting of an amorphous form of carbon, obtained as a residue when wood, bone, or other organic matter is heated in the absence of air 炭,木炭 ■a substance of this kind used for drawing 木炭笔 ■[count noun]a drawing made using this substance 木炭画 ■a dark grey colour 炭灰色 [as modifier]a phone in charcoal grey. 一部炭灰色的电话。
语源
late Middle English: probably related to coal in the early sense 'charcoal'