rhyolite

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun very acid volcanic rock

Etymology

Coined by Ferdinand von Richthofen as German Rhyolith, from Ancient Greek ῥέω (rhéō, “flow”) + λίθος (líthos, “stone”) (modified to + -lite).

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