- 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
- British Slang. an abusive woman.
Origin of slag2
Examples from the Web for slag
We could toss all this information onto the ever-growing “Oh, those crazy Republicans” slag heap, have a laugh, and let it go.The GOP Plan to Steal Elections
January 26, 2013
It would be the equivalent of someone trying to slag Halle Berry without mentioning Catwoman.George W. Bush: Barack Obama’s Best Friend in the 2012 Election
April 3, 2012
The archetypal Arizonan did not slag the state; he spoke in the language of a real-estate brochure.The Governor Who Hates Her State
July 19, 2010
The separation of the slag and iron is facilitated by throwing in some lime from time to time.Heroes of the Telegraph
Of these, oyster or marine shells, burnt shale, and slag are most common.American Rural Highways
T. R. Agg
Because, at the foot of the tree, as if broken off the stone, fragments of slag were found.The Book of the Damned
This cement is made of limestone and clay, or marl, chalk, and slag.Diggers in the Earth
Eva March Tappan
Slag and sand were delivered to the mixer by means of wheelbarrows.Concrete Construction
Halbert P. Gillette
- 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 and History 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.