graphite

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun used as a lubricant and as a moderator in nuclear reactors

Etymology

Borrowed from German Graphit (A. G. Werner 1789), from Ancient Greek γράφω (gráphō, “to write”).

In classic literature

Synonyms

black lead, plumbago

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