cinder in Portuguese

Partially or mostly burnt material that results from incomplete combustion of coal or wood etc.; it often rides the rising smoke column into the air, and it can pose a fire hazard when it lands, in dry conditions.

Partially or mostly burnt material that results from incomplete combustion of coal or wood etc.; it often rides the rising smoke column into the air, and it can pose a fire hazard when it lands, in dry conditions.

Slag from a metal furnace.