1. (n.) The dross, or recrement, of a metal; also, vitrified cinders.

2. (n.) The scoria of a volcano.

alluvion alluvium ash ashes bones brand calx carbon chaff charcoal cinder clinker coal coke coom culm deadwood deposition deposits diluvium dishwater draff dregs dross dust ember feces filings froth fume garbage gash grounds hogwash husks lava leavings lees loess moraine offal offscourings offscum orts parings potsherds precipitate precipitation rags raspings reek refuse scoria scourings scrap iron scraps scum sediment settlings shards shavings silt sinter slack slop slops smoke smudge smut soot stubble sublimate sullage sweepings swill tares wastage waste waste matter wastepaper weeds