adjective, slag·gi·er, slag·gi·est.
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Words nearby slaggy
Example sentences from the Web for slaggy
It was hard walking over the shingly, slaggy stones, but they made their way to the summit at last.A Desert Drama|A. Conan Doyle
Slaggy and scoriaceous phases are common, but probably represent only a small part of the different flows.
In a basal flow in Moraine Park, the slaggy and compact phases show differences in phenocrysts as well as in groundmass.