- Also called cinder. the more or less completely fused and vitrified matter separated during the reduction of a metal from its ore.
- the scoria from a volcano.
- waste left over after the re-sorting of coal.
- to convert into slag.
- Metallurgy. to remove slag from (a steel bath).
- to form slag; become a slaglike mass.
Origin of slag1
- Also called: cinder the fused material formed during the smelting or refining of metals by combining the flux with gangue, impurities in the metal, etc. It usually consists of a mixture of silicates with calcium, phosphorus, sulphur, etcSee also basic slag
- a mass of rough fragments of pyroclastic rock and cinders derived from a volcanic eruption; scoria
- a mixture of shale, clay, coal dust, and other mineral waste produced during coal mining
- British slang a coarse or dissipated girl or woman
- (tr) British slang (usually foll by off) to abuse (someone) verbally
- (intr) Australian slang to spit
Word Origin for slag
"refuse from smelting," 1550s, from Middle Low German slagge (German Schlacke) "splinter flying off when metal is struck," related to Old High German slahan "to strike, slay" (see slay (v.)).
"denigrate," by 1971, from slag (n.) in a secondary sense of "worthless person" (1788). Related: Slagged; slagging.
- The vitreous mass left as a residue by the smelting of metallic ore. It consists mostly of the siliceous and aluminous impurities from the iron ore.