scoria

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun the scum formed by oxidation at the surface of molten metals

Etymology

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

In classic literature

Synonyms

slag, dross

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