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Scoria

//ˈskɔː.ɹi.ə// noun

Noun

1
The slag or dross that remains after the smelting of metal from an ore. countable, uncountable
"The like stuff is in Anacharsis: hot metal; full of scoriae, which should and could have been smelted out, but which will not."
2
the scum formed by oxidation at the surface of molten metals wordnet
3
Rough masses of rock formed by solidified lava, and which can be found around a volcano's crater. countable, uncountable
"To the south lay broken shapes of scoria in a lava bed as far as the eye could see."

Inherited from Middle English, from Latin scōria, from Ancient Greek σκωρία (skōría), from σκῶρ (skôr, “dung”).

Unscramble this word: scoria