/ ˈtʃɑːkəʊl; NAmE ˈtʃɑːrkoʊl/ noun [ U ]
1.
a black substance made by burning wood slowly in an oven with little air. Charcoal is used as a fuel or for drawing :
charcoal grilled steaks
a charcoal drawing
2.
(also ˌcharcoal ˈgrey ) a very dark grey colour
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WORD ORIGIN
late Middle English : probably related to coal in the early sense charcoal .