Noun
a furnace (as on a steam locomotive) in which fuel is burned
Source: WordNetNovelty almost matched it in terms of efficiency, but its firebox design caused it to gradually slow to a halt due to a buildup of molten ash (called "clinker") cutting off the air supply. Source: Internet
Online retailer Firebox has launched a giant inflatable unicorn that sprays water from its horn. Source: Internet
This kiln usually consists of one long firing chamber, pierced with smaller ware stacking ports on one side, with a firebox at one end and a flue at the other. Source: Internet
If the water level drops, such that the temperature of the firebox crown increases significantly, the lead melts and the steam escapes, warning the operators, who may then manually suppress the fire. Source: Internet
Lead fusible plugs may be present in the crown of the boiler's firebox. Source: Internet
The more primitive style was used outdoors or in well ventilated areas since hot gasses from the firebox exhaust around the wok. Source: Internet