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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clue for "SCORIA"

SCORIA: Volcanic rock ejecta; Slag; Smelting refuse; Foolhardy; Metal dross; Smelting residue; Dross.; Dross; slag.; Cinders from a volcano.; Leftover of the smelting process.; Refuse from melting of metals.; Refuse of a smeltery.; Slaggy lava.; Volcanic cinder.; Lava.; Metal refuse.; Ore slag; Smelter slag; Dark volcanic rock