1. (n.) The scum or refuse matter which is thrown off, or falls from, metals in smelting the ore, or in the process of melting; recrement.

2. (n.) Rust of metals.

3. (n.) Waste matter; any worthless matter separated from the better part; leavings; dregs; refuse.

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