Derived from Middle Low German slagge, which is in metallurgy the result of schlagen and Schlag ( OHG slag, slac, (a hit, strike, blow). The Middle Low German slagge was in the 16st century taken into High German Language as Schlacke.
Schlacke f (genitive Schlacke, plural Schlacken)
- slag, dross, scoria
- cinders, clinker
- sediment, dregs, scum
- metabolic residue in body tissue or digestive system (physiology)
- (dialect) rectum
- Schlacke in Duden online