noun
charcoal drawing
Refers to a picture drawn with charcoal, or the art technique itself.
彼女は木炭画を習っている。
She is learning charcoal drawing.
この木炭画はとても繊細だ。
This charcoal drawing is very delicate.
水墨画 is ink wash painting, a different monochrome art form.
Compound of 木炭 (charcoal) and 画 (picture, drawing).