(n.) Soot; coal dust; refuse matter, as the dirty grease which comes from axle boxes, or the refuse at the mouth of an oven.

alluvion alluvium ashes brand calx carbon charcoal cinder cinders clinker clinkers coal coals coke coom deposition deposits diluvium draff dregs dross ember embers feces froth fume fumes grounds lava lees loess moraine offscum precipitate precipitation reek scoria scum sediment settlings silt sinter slag smoke smudge smut soot sublimate sullage