slag
/ˈslæɡ/ noun C1- Waste material from a mine.
- Scum that forms on the surface of molten metal.
- Impurities formed and separated out when a metal is smelted from ore; vitrified cinders.
- Hard aggregate remaining as a residue from blast furnaces, sometimes used as a surfacing material.
- Scoria associated with a volcano.
Plural slags
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